Precision cut-rifled, 5S rifling, 1:8.75 fluted, free floated, stainless steel barrel. All barrels are threaded 9/16-24 RH. Direct impingement operating system. Beefy side-charging upper with extra thick walls to minimize flex with long, heavy barrels. The side charger allows a minimum of movement when firing from a concealed position. Standard build features our extended-length MK10 handguard, which is made of G10 composite material and vented to aid barrel cooling with the top vents offset from the sight line to minimize mirage. Rifles include the Magpul PRS® stock, which is adjustable for length of pull and cheek height, as well as the Alexander Arms® Tactical Blade trigger. GSR weapons are tested for accuracy and perform at 1.0 MOA or better at 100 yards before being sold. Ships with one 10-round magazine. Weight of 20-inch rifle is 10 pounds. This rifle ships in an Alexander Arms® soft carry bag and includes one 10-round magazine.
Barrel Material Stainless Diameter under hand guard 0.980 flutedDiameter at gas block 0.907 Muzzle thread 3/4-28tpiRifling 5 groove Twist rate 1 in 8.75
GSR- extra long free float ventilated G10 FR4 composite tube. External threaded locking collar with 7075 aluminum alloy barrel nut
BOLTASTM 9310 equivilant surface refined case hardened peened and phosphatedASTM 9310 equivilant triple tempered surface refined hardened and peened with thin dense chrome platingBARREL EXTENSIONGrendel specificUPPER7075-T651 forged Grendel specific ejection portMonolithic receiver rail system 7075-T651 alloy annodized type 2 class 3LOWER7075-T651 forged, AR15 styleCARRIERInternally honed and hard chromed, M16 type, ATF approved
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