The PMAG 20 LR/SR GEN M3 Window is a lightweight, cost effective, highly reliable 20-round magazine for SR25/M110 pattern rifles chambered in 7.62x51 NATO (.308 Winchester). Constructed from next-generation impact and crush-resistant polymer, the new magazine features durable, dual-side transparent windows which allow for a quick count of the approximate number of rounds remaining in the magazine via a high visibility indicator coil on the spring and numerical markers on the magazine body.  Like our other PMAGs, the 20 LR/SR GEN M3 Window magazine features a stainless-steel, corrosion-resistant spring and an anti-tilt, self-lubricating follower. The magazine’s lines follow a constant-curve internal geometry for continuous reliable feeding. The low-profile ribs and aggressive front and rear texturing help give shooters a positive grip for magazine changes in all environments. 

Designed specifically for SAAMI-spec ammunition, the PMAG 20 LR/SR GEN M3 Window is less than half the weight of standard issue steel magazines and maintains a service life round count approximately equal to the rifle barrel itself. Accessories designed for the 7.62X51 NATO line of PMAGs are also compatible with the PMAG 20 Window.

Specifications:

Caliber: 7.62x51mm / .308 Winchester

Platform: AR10, M110, SR25

Capacity: 20

Weight: 5.8 oz.

Length, max: 6.5 in.

Compatibility:Armalite AR-10A, Colt LE901-16S, CORE Rifle Systems CORE30, JP Enterprises LRP-07, KAC SR25, LaRue OBR, Les Baer .308, LMT .308 MWS, LWRCI REPR, Mega Arms MATEN, Noveske Gen III N6, POF P-308, Ruger SR-762, S&W M&P10, SIG716, and others*

Optimized for use with SAAMI-spec 7.62x51/.308 Winchester ammunition.

*NOTE: Compatible with older model Bushmaster .308 ORC, Remington R-25, and DPMS LR308 rifles, but not optimized for bolt lock functionality with newer models based on the DPMS GII design. NOT compatible with Armalite AR-10B, Springfield Armory M1A, Rock River Arms LAR8, FN SCAR 17S, PTR-91, HK417 or any other rifles that utilize M14, FN FAL, or HK 91/G3 patterned magazines.