308 AR Bolt Catch Screw | AR-10 Bolt Catch Pin

Close-up picture of a SI Defense/Falkor 308AR Bolt Catch Screw - Stainless Steel - www.308ar.com

SI Defense/Falkor 308 AR Bolt Catch Screw – Stainless Steel

 

Armalite AR-10B Lower Parts Kit 10LRPK-T www.308ar.com

Armalite AR-10B Lower Parts Kit 10LRPK-T

308AR AR-10 Bolt Catch Pin – The bolt catch pin, one of the smallest parts on the 308AR, AR-10 and AR-15 platform weapons is a part that can stop an AR-10 308AR build dead in it’s tracks if you didn’t purchase the correct one or the correct LOWER PARTS KIT for your STRIPPED LOWER RECEIVER. Here’s why. The AR-15 platform  uses a roll pin and that’s taken for granted when shooters move up to the AR-10 and 308AR platforms. Unfortunately this is where the topic gets muddy.

Armalite EL0220 AR-10 Bolt Stop Pin - www.308ar.com

Armalite EL0220 AR-10 Bolt Stop Pin

The Armalite AR-10 utilizes a roll pin Armalite part number EL0220 which is the same as their M-15/AR15 rifles. while DPMS LR-308 based weapon utilize a proprietary hybrid pin/screw.

Picture of a DPMS 308AR Bolt Catch Screw not an AR-10 Bolt Catch Pin

DPMS 308 AR Bolt Catch Screw

This screw is essentially set screw who’s threads have been removed from one end creating a hybrid screw type pin. Now unfortunately though not all DPMS LR-308 based LOWER RECEIVERS utilize the hybrid BOLT CATCH PIN. Some manufacturers utilize the roll pin method identical to the Armalite AR-10.

Now further complicating the mix at least one AR15 manufacturer has begun utilizing the hybrid screw rather than the milspec roll pin used universally on the platform for decades.

Brownells Roll Pin Holder Set - www.308ar.com

Brownells Roll Pin Holder Set

See our page on roll pin tools here

308AR AR-10 Bolt Catch Pin