Primary Weapons 308 AR H2 Enhanced Carbine Buffer

by Donald Sullivan | Apr 18, 2020 | Buffers | 0 comments

Primary Weapons 308 AR H2 Enhanced Carbine Buffer

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Picture of a PWS AR 10 Enhanced H2 Carbine Buffer

PWS AR 308 Enhanced H2 Carbine Buffer

The PWS AR 308 Enhanced H2 Carbine Buffer is a 4140 Steel Body .308 Short Buffer that features a unique fluted design with minimum contact points so that debris can clear away easily. The FNC LIFE HD Surface Treatment chemically bonds in lubrication for smoother cycling. Used for .308 applications and ships with all MK2 series complete lowers and rifles. Shortened to work with AR-10 platforms using standard buffer tubes. Weighs 4.4 oz

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What is Ferritic Nitrocarburizing (FNC)

Ferritic Nitrocarburizing (FNC) imparts high surface hardness, improved wear resistance and fatigue resistance to a wide variety of carbon steel, alloy steel and cast iron parts. Because the process is carried out at temperatures below 1100 F, retention of core properties and good dimensional control are achieved. In many applications, FNC treatment also improves corrosion resistance through the formation of a continuous compound layer on the work-piece surface which can allow for the elimination of subsequent protective plating operations or application of rust preventive.

Improve surface hardness and wear resistance with ferritic nitrocarburizing

The surface compound layer formed by FNC treatment is an epsilon iron-nitride compound and this layer may range in depth from .0002″ to .0010″ inch depending upon cycle parameters selected and base material being treated. FNC compound layer hardness values will typically range from 55 to 65 HRC depending on the base material being treated. Higher alloy steels with nitride forming elements (Cr, Mo, Ti, W, and Al) will have higher hardness compound layers than plain carbon and low alloy steels and will also benefit from the formation of an underlying higher hardness diffusion zone below the compound layer that gives improved fatigue life and helps to support the surface compound layer.

Ferritic Nitrocarburizing is often selected to replace chrome plating due to environmental concerns with plating. FNC also has been used to as an alternative process to solve problems with size change and distortion associated with higher temperature treatments like carburizing or carbonitriding.

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JP Enterprises Tuned 308AR Buffer Spring JPS-OSC.308

by Donald Sullivan | May 14, 2015 | Buffers | 0 comments

JP JPS-OSC.308 308AR Tuned Buffer Spring

JP Enterprises Tuned 308AR Buffer Spring

In the first days of this site John Paul of JP Enterprises was instrumental in passing on very good knowledge of the 308AR platform. Not only was has the company with his name on it been in the game for a long time it has also been building reliable competition rifles when others did not have a weapon on the drawing board. When JP talks I listen

JP has developed a new high grade extra power buffer spring for 308AR AR-10 rifles with collapsible stocks. It is custom made to JP specifications. Center-less ground and polished on outside edge to a mirror finish for silent, smooth operation. 7% more powerful spring rate for improved impulse feel resulting in faster sight recovery and improved reliability. This spring will make your 308AR or AR-10 carbine sound quieter and smoother. This is an inexpensive way to improve the sound, feel and reliability of your 308AR or AR-10 carbine. The length and power of this spring falls between a factory standard power spring and a Sprinco .308 carbine extra power spring.

Precision centerless ground and polished operating springs offer a smoother and quieter operation in AR buffer tubes. Improved impulse feel results in faster sight recovery and improved reliability.

*Designed for .308/7.62mm AR style carbines with M4 length, 7″ deep buffer tubes and 2.5″ buffers.

Note JP also recommends this buffer spring for 9mm AR15 rifles

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308 AR Buffer

by Donald Sullivan | May 23, 2014 | Parts, Buffers | 0 comments

308 AR Buffer

The 308 AR and AR10 weapon platforms utilize a buffer system that is typically not compatible with he AR15, M4 platform

JP Enterprises JPSCS Silent Captured Spring System

Armalite

Heavy Buffers

David Tubb AR-10, SR25,LR-308 CS FlatWire Buffer Spring

The CS Flat Wire Buffer Spring is the next generation spring design. The CS round wire buffer spring was a significant step forward when compared to buffer springs manufactured from music wire. The CS flat wire spring provides another significant step forward in performance. CS Flat Wire retains all the performance attributes embodied in our CS round wire buffer spring and then enhances them.

At installed height (bolt in battery) the load on the bolt is increased by about 10% compared to our CS round wire spring. This works more energy before the bolt unlocks and provides a flatter recoil impulse. This minimizes the effect of the spring returning the bolt to battery. The CS flat wire spring requires about 6% less force to fully compress than our CS round wire spring. Less energy is bled off to the gun, resulting in reduced rifle (and sight) movement.

By design, the CS flat wire spring operates with significantly lower stresses than similar round wire springs. This improves the consistency of the spring throughout its working life. Through 500,000 compression cycles, a change in spring loading of less than 2% occurs. A conventional music wire spring can change by as much as 7% the very first time it is compressed!