The PMAG 20 LR/SR GEN M3 brings many of the M3 improvements to the 20-round 7.62 NATO/.308 Winchester SR-25 magazine form factor and replaces the previous generation MAG243 in the Magpul line. The 7.62x51 NATO (.308 Winchester) PMAG 20 LR/SR GEN M3 is a lightweight, cost effective, high reliability magazine for SR25/M110 pattern rifles featuring true 20-round capacity, constant-curve body and anti-tilt follower. Designed specifically for military-issue MK11/M110 rifles and mil-spec ammunition (including M118LR), the PMAG 20LR/SR 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. Features Optimized for use with 7.62x51 NATO (.308 Winchester) ammunition with an overall cartridge length less than 2.820 inches, including M118LR Additional commercial rifle compatibility includes: the new Armalite AR-10A, Bushmaster .308 ORC, Colt LE901-16S, CORE Rifle Systems CORE30, DPMS, LR308, JP Enterprises LRP-07, KAC SR25, LaRue OBR, Les Baer .308, LMT .308 MWS, LWRCI REPR, Mega Arms MATEN, POF P-308, Remington R-25, S&W M&P10, SIG716, and others NOTE: NOT compatible with Armalite AR-10B, Noveske N6, 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 Next-generation impact and crush resistant polymer construction Constant-curve internal geometry for smooth feeding Anti-tilt, self-lubricating follower for increased reliability High-quality stainless steel spring for corrosion resistance Ribbed gripping surface and new aggressive front and rear texture for positive magazine handling Paint pen dot matrix panels on the bottom of the body to allow for identification marking Flared floorplate aids magazine handling and disassembly yet is slim enough for use with many pouches