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For Smoother, Cooler Operation, Reduced Recoil, & Less Frequent Cleaning

Drop-in gas piston conversion kit installs in only five minutes and improves the reliability and function of your AR-15 by eliminating fouling caused by gas venting into the receiver. Rifle runs cooler, with less frequent need for cleaning and less wear on carrier and bolt - resulting in longer service life from these critical parts. The unique, kidney-shaped cross-section of the piston and piston chamber provides extra mass and surface area to evenly spread out gas pressure and reduce felt recoil, allowing you to stay on target for rapid follow-up shots. Installs in minutes on both semi- or full-auto/burst rifles with a barrel O.D. of .875" or less. No need to remove gas block/sight tower, and no permanent alterations to barrel or upper receiver - reinstall original parts at any time. Replacement bolt carrier with integral lug is machined from a single piece of steel for a lifetime of use. Models available to fit Carbine and Rifle gas systems.


AR-15, Issue:11, Page:018
Big Book Catalog, Issue:68, Page:018

SPECS: Steel, black oxide finish. Handguard – Reinforced polymer composite, black. Kit includes preassembled piston assembly, bolt carrier, handguard, and instructions. Carbine fits 11½" to 16" barrels with .875" O.D. or smaller, and carbine-length gas system. Rifle fits 20" barrels with .875" or smaller O.D. and rifle-length gas system.

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2 Item(s)
16" CARBINE AR15/M16 GAS PISTON KIT
100-005-291WB
Carbine Gas Piston Kit
100005291Carbine Gas Piston Kit

Mfr Part: OPS416

$299.99

Online Only
In Stock
20" AR15/M16 RIFLE GAS PISTON KIT
100-005-290WB
Rifle Gas Piston Kit
100005290Rifle Gas Piston Kit

Mfr Part: OPS420

$299.99

Online Only
In Stock
AR-15/M16 GAS PISTON CONVERSION KIT