Gas Block Genie Gas Block Alignment Tool

by Donald Sullivan | Jan 12, 2019 | Tools | 0 comments

Gas Block Genie Gas Block Alignment Tool

Picture of a Gas Block Genie AR Gas Block Alignment Installation Tool

Gas Block Genie Gas Block Alignment Tool

Just spotted this on Brownells. Interesting, inexpensive and reusable tool for proper gas block alignment. Currently only available for .750 barrels but other sizes are coming.

Ever put together an AR build, only to find that your semi-auto cycling system just doesn’t cycle? Looks like that gas-block installation didn’t go as well as you thought it did. Avoid future frustration by adding the Two Two Three Innovations Gas Block Genie to your AR building kit.

Unlike other gas-block alignment tools on the market, the Two Two Three Innovations AR Gas Block Genie Gas Block Alignment Tool can be used again and again, as many times as you want, during your AR build. All it takes is three simple steps.

The type of gas block doesn’t even matter when using the Gas Block Genie. Whether you’re working with clamp-on designs, rail-block designs or micro-size options, the Gas Block Genie can handle it all!

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Gas Block Genie Gas Block Alignment Tool Instructional Video

Gas Block Genie Gas Block Alignment Tool Instructions

The Gas Block Genie quickly and easily allows you to perfectly align the AR-15 or AR-10 gas block hole with the gas port in your barrel every time.

Squeeze the Genie slightly to install into the forward face of the gas block so that the hole in the Genie is centered on the gas block hole. It may be easier to remove the rearmost set screw to do this. Part of the Genie should be sticking out the front side of the gas block
Use a very fine point marker or scribe to make a mark on the Genie where the forward edge of the gas block is. Make a small mark on the gas block at the slot in the Genie to indicate the top center of the gas block. It may be helpful to use a black marker on a stainless surface and a silver marker on a black surface.
Remove the Genie from the gas block and snap onto the barrel so that the hole in the Genie is centered around the gas port in the barrel.
Transfer the mark you made in step 2 to the barrel through the slot in the Genie.
Remove the Genie and slide the gas block onto the barrel. As the Gas block approaches the barrel’s gas port you will see the line on the barrel and the mark on the front face of the gas block. Simply align the two and you are finished! A perfectly aligned gas block!

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RAINIER ARMS AVALANCHE MOD2 308 CHARGING HANDLE HEX

by Donald Sullivan | Sep 30, 2018 | Charging Handles | 0 comments

RAINIER ARMS AVALANCHE MOD2 308 CHARGING HANDLE HEX

Rainier Arms Avalanche MOD2 308 AR10 Charging Handle

Rainer Arms Avalanche 308 AR Charging Handle

Rainier Arms Avalanche Mod2 308 AR Charging Handle features unique interchangeable handles that offer a customized look and feel while supporting individual shooting styles, preserving the fast and fluid motion from either their strong side or support side.

Easily swap out handles from patent-pending design
Aircraft-grade aluminum
Made in the USA
Weight 1.3oz

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POF TOMAHAWK AMBIDEXTROUS CHARGING HANDLE 308 7 62 00850

by Donald Sullivan | Jul 22, 2018 | Charging Handles | 0 comments

POF TOMAHAWK AMBIDEXTROUS CHARGING HANDLE 308 7 62 00850

POF TOMAHAWK AMBIDEXTROUS CHARGING HANDLE .308 7.62

The P.O.F. Tomahawk Ambidextrous Charging Handle features medium sized handles to make manual weapon cycling a breeze. The 308 AR tomahawk charging handle is billet machined to exacting standards in the USA from American 7075 billet aluminum and finished with durable black Type III hardcoat anodize. Inspired by the Patriot Ordnance American Patriot Tomahawk, this charging handle has been optimized for quick and efficient functionality with either hand. This model fits standard large frame 308 AR rifles and pistols.**Not compatible with SIG Sauer 716

SKU: 5165448271, UPC: 847313008503, MFR#: 00850 Compatibility: AR 10 – .308 / 7.62, Finish: Hardcoat Anodized, Material: 7075 Billet Aluminum

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308 AR M-PRO 7 AR15 CLEANING KIT

by Donald Sullivan | May 23, 2018 | Tools, Cleaning | 0 comments

308 AR M-PRO 7 AR15 CLEANING KIT

M-PRO 7 AR 15 CLEANING KIT

Brownells has teamed up with M-Pro 7 to develop the M-PRO 7 AR15 CLEANING KIT. This cleaning kit specifically for maintaining an AR-type rifle in peak operating condition. Now you can clean your AR using the same operationally tested products used by the United States Armed Forces.

Inside the kit’s compact hardshell case you’ll find M-Pro 7 Gun Cleaner that safely penetrates deep beneath even tough, scorched-on carbon fouling to lift away the gunk and leave the bore sparkling clean. M-Pro 7 Cleaner/Lubricant/Protectant delivers superior lubrication and corrosion protection, and can also be used for quick cleaning on the go, when there isn’t enough time for the complete cleaning routine.

You get a military-style multi-section steel cleaning rod with a folding handle, plus five high-quality bronze brushes to clean ARs in the standard .223/5.56mm and .308/7.62mm calibers, as well as 9mm and .45 chamberings, plus a brush for cleaning the bolt carrier way—critical for maintaining reliable weapon cycling. There’s plenty of absorbent cotton flannel patches in three sizes to fit all those calibers, plus the M-Pro 7 Weapons Maintenance Guide. Due to its non-hazardous and non-flammable contents, this kit meets TSA regulations for legal transport in checked baggage aboard commercial airliners.

AR-10, 308 AR and AR15 Cleaning Kit

SPECS: Kit contains polycarbonate box, black; 2 fl. oz (59ml) Gun Cleaner; 2 fl oz. Cleaner/Lubricant/Protectant; five-section steel cleaning rod w/30” maximum extended length; (4) bronze bore brushes to fit .22/.223/5.56mm, .308/7.62mm, 9mm, and .45; bronze bolt way cleaning brush; polymer patch loop; 1” circular, 2” square, and 2½” square cotton flannel patches; lint-free gun cloth; and Weapons Maintenance Guide.

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LANTAC .308/7.62X51MM Enhanced Full Auto Style Bolt Carrier Group NiB Coated E-BCG

LANTAC .308/7.62X51MM Enhanced Full Auto Style Bolt Carrier Group NiB Coated E-BCG

Lantac Enhanced BCG Full Auto Style E-BCG Enhanced Bolt Carrier Group 308

LANTAC .308/7.62X51MM Enhanced Full Auto Style Bolt Carrier Group NiB Coated E-BCG

I find it interesting that two of the most expensive .308 bolt carrier groups are designed with philosophies that are 180 degrees apart. The JP Low Mass 308 Bolt Carrier Group is a lightweight BCG that must be used in conjunction with JP Rifles Low Mass Recoil System. On the other end of the spectrum is the Lantac E-BCG .308 part number LA00300. In a market of “me too” inexpensive bolt carrier groups Lantac differentiates itself with superb quality, brilliant engineering and patents that deliver one of the best performing BCG’s available.

The Lantac E-BCG is designed to be weight balanced from front to back. This makes for a pretty heavy bolt carrier group. The added weight increases lock time and should theoretically reduce recoil. That additional mass combined with the BCG’s NiB coating lubricity equates to smooth cyclic function. Lantac has designed “Port Forward” channels into the carrier body to direct gases out and away from the bolt. Suppressed shooters will really benefit from these features. Lantac designed a round gas key or “smooth cam”. To me this is a halfway point between the POF gas key which is a ball bearing and a standard square gas key. The Lantac E BCG cost about twice as much as traditional quality carriers and that hasn’t stopped it from becoming wildly popular. In fact other manufacturers such as ADM offer it for sale among their own hardware. Lastly it’s a crazy sign of the times wen you can spend $300-$450 on a 308 bolt carrier and for about one third more buy a cheap and complete AR-308/AR-10.

Visit Lantac to Learn More

Lantac Enhanced BCG Full Auto Style (.308/7.62) LANTAC E-BCG™, Enhanced Bolt Carrier Group.

The LANTAC E-BCG Enhanced Bolt Carrier Group is precision machined from 8620 Steel with a shot peened bolt manufactured from Carpenter 158 and Magnetically Particle Inspected. The entire carrier assembly is NiB, Electroless Nickel Boron coated with the patented, advanced UCT EXO process, unlike standard NiB coatings. This offers extreme lubricity with a friction coefficient of .02 and surface hardness of 82-85 Rockwell C.

The carriers patent pending design features unique shrouded and forward facing gas ports that have also been re sized so that gas is vented differently to a standard carrier. This results in a system that runs flatter with a smoother energy pulse. In addition, the system also runs cooler and cleaner and there is also less pressurization of the upper receiver when running a suppressed barrel. The flared boss at the tail of the carrier enhances the BCG’s lock position within the upper and makes it more consistent, resulting in an accuracy improvement.

All critical dimensions are hard turned / ground after heat treat and the bore of the carrier and gas key have been hard chrome lined for the best possible wear resistance. All E-BCG’s feature the LANTAC CP-R360 patent pending domed cam pin that is machined from 17-4PH Stainless Steel and hardened to H900 condition (45RC approx). The ultra-smooth head reduces wear within the upper receiver. Gas keys are properly staked at four points and only grade 8 fasteners are used in assembly.

Enhanced BCG Full Auto Style (.308/7.62) LANTAC E-BCG™, Enhanced Bolt Carrier Group.

AR10 Full Auto Style for increased mass and lock time.
Our DPMS Style 308 BCG is precision machined from 8620 Steel with a 9310 Precision Hard Ground Bolt.
The entire carrier assembly is NiB, Electroless Nickel Boron coated with the patented, advanced UCT EXO process, unlike standard NiB coatings.
This offers extreme lubricity with a friction coefficient of .02 and surface hardness of 82-85 Rockwell C.
The carriers patent pending design features unique shrouded and forward facing gas ports that have also been re sized so that gas is vented differently to a standard carrier.
This results in a system that runs flatter with a smoother energy pulse.
In addition the system also runs cooler and cleaner, there is also less pressurization of the upper receiver when running a suppressed barrel.
The flared boss at the tail of the carrier enhances the BCG’s position within the buffer tube at the time of cycling and allows for a flatter more controlled reciprocation of the assembly.
All critical dimensions are hard turned / ground after heat treat.
All E-BCG’s feature the LANTAC CP-R360-H™ patent pending domed cam pin that is machined from 17-4PH Stainless Steel and hardened to H900 condition (45RC approx).
The ultra smooth head reduces wear within the upper receiver.
The BCG’s weight helps to increase lock time with smoother operation.
Gas keys are properly staked at four points and only grade 8 fasteners are used in assembly.

The E-BCG’s forward porting and unique shape assist in reducing pressurization inside the upper receiver that can be caused by short barrel rifles running suppressors.
However, it should be noted that the E-BCG™ is not a complete solution for this issue and all rifles are different. ‘Over Gassed’ guns will suffer to a larger extent from this problem.

Weight 1Lb 2.1oz

DPMS Pattern
Forward Porting, Enlarged Vents.
Balanced flared boss.
8620 Carrier, Heat Treated, Hard Turned.
9310 Bolt, Hard Turned / Ground.
NiB UCT EXO Coating.
CP-R360-H Domed Cam Pin
Mil-Spec Gas Rings
Mil-Spec Staked Gas Key
Grade 8 Hardened Fasteners
All Hard Chrome surfaces are to MIL-STD-171 1.2.2.2
Lifetime Warranty.
Made in the USA.

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AR-10 BARREL EXTENSION | AR308 BARREL EXTENSION

by Donald Sullivan | Dec 28, 2017 | Barrel Extensions | 4 comments

AR-10 BARREL EXTENSION | AR308 BARREL EXTENSION

AR-10, 308 AR/AR308, DPMS G2 Barrel Extensions

We frequently get inquiries from shooters looking for AR-10 Barrel Extensions. Of course if you have been following this site long enough you know that they probably are not looking for AR-10 barrel extensions but instead in most cases looking for DPMS LR-308 compatible 308 AR/AR308 barrel extensions. Furthermore if one has the skills to mate a barrel and barrel extension why limit themselves to Armalite AR-10 bolt carrier groups.

Barrel Extension Considerations

Armalite AR-10 and DPMS Compatible Barrel Extensions are different. The require different bolts.
The barrel extension dictates the bolt to be used with the carrier
AR-10 can use a DPMS barrel with a DPMS barrel and barrel extension as long as a DPMS 308 bolt is used
DPMS platform can use an AR-10 barrel and barrel extension as long as an AR-10 bolt is used
Do not use the same bolt with more than one barrel. Every barrel extension/barrel combination requires it’s own dedicated bolt.
Theoretically AR-10 and DPMS 308 Bolt Carriers are interchangeable as long as the bolt style matches the barrel extension
DPMS G2 (DPMS GII) is not compatible with AR-10 or DPMS 308 barrel extensions. G2 is a different platform completely

Note: While above we state the interchangeability between AR-10 and DPMS platforms we feel it is bad practice and unnecessary to mix the brands.

Note: To date the only place we know to acquire an actual AR-10 barrel extension is from Armalite. DPMS is the standard most manufacturers have adopted. Be careful when a seller refers to AR-10. If compatibility isn’t clear and obvious contact the manufacturer or vendor.

Picture of a WMD Guns NIB-X 308 AR and AR-10 Barrel Extension

WMD Guns NIB-X 308 AR Barrel Extension

WMD’s 308 AR Barrel Extension has been NiB-X coated to increase lubricity and provide for smooth locking and unlocking with the critical bolt interaface. Feed ramps are 45°. The entire barrel extension is polished.

M4-type barrel extension has NiB-X finish that aids in smooth locking and unlocking with the bolt, consistent feeding and helps prevent hang-ups. This high-tech coating lasts the life of the weapon, and won’t rub off, flake off, or gall. Helps dissipate heat for cooler operation, too. Precision machined from 8620 steel to USGI specifications with integral M4-type feed ramps and predrilled locator pin hole.

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BAT Machine AR308 Barrel Extension

Precision barrel extension made for the AR-10 (DPMS style) rifle platforms. These extensions are completely machined in the hard condition to provide the most accurate extension possible. The BAT Machine AR308 Barrel Extension is machined 4140 chrome-moly steel barrel extensions help the custom rifle builder ensure a secure barrel fit for best alignment and accuracy. Heat treated for surface hardness to give years of reliable service. Available for M4 carbine extension with feed ramp cuts. AR-Style .308 extension fits the DPMS LR-308 and other .308s with the same thread pattern, plus it offers M4-style feed ramp cuts to ensure extra reliability in getting rounds from the magazine to the chamber. All models have pre-drilled locator pin hole.

SPECS: 4140 chrome-moly steel, in-the-white. AR-Style .308 –1.200″ O.D., .940″ I.D., w/M4-style feed ramps. Fits DPMS LR-308, Remington R-25, and other AR-Style .308 rifles with same receiver thread pattern.

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Picture of a Lilja Barrels AR-10 .308AR Barrel Extension

Lilja Barrels .308 AR Barrel Extension

Adam Lilja dropped us a message to let us know Lilja Barrels is now offering a 308 barrel extension they make in-house. These are a top-quality 308AR barrel extensions made on CNC equipment with a single-point thread. Following heat treat we hard-turn the outside diameter and true the face and lugs for maximum concentricity and elimination of any distortion from heat treat. Custom AR builders can now use the same extensions they use on their finished drop-in barrels.

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Miller Precision Arms 308 AR, AR308 Barrel Extension

Miller Precision Arms 308 AR, AR308 Barrel Extension features machined 4140 chrome moly steel barrel extensions help the custom rifle builder ensure a secure barrel fit for best alignment and accuracy.

Description

Heat treated for surface hardness to give years of reliable service.
Available for M4 carbine extension with feed ramp cuts.
AR-Style .308 extension fits the DPMS LR-308 and other .308s with the same thread pattern, plus it offers M4-style feed ramp cuts to ensure extra reliability in getting rounds from the magazine to the chamber.
All models have pre-drilled locator pin hole and pin is included.

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