6.5 Grendel General Technical Specifications

• WEAPON

Tactical Series	Overall Length(inches)	Weight(lbs)
Barrel	Collapsible/Extended	Hand Guard/Rail
10.5	N/A
16	32.625/36.5	6.590/7.225
Advantage Series
19.5	38.0	7.540/7.985
24	42.5	8.63/9.075

• UPPER ASSEMBLY AND MAGAZINES

Sub Assembly	Weight
Lower
A2 Standard	2.540
M4 Standard	2.225
GDMR	3.405
Tactical Upper
10.5	3.845
10.5 plus rail	3.975
14.5	4.080
14.5 plus rail	4.550
16	4.365
16 plus rail	5.000
Advantage Uppers
Entry 19.5	5.000
Hunter 19.5	5.000
Overwatch 24	6.090
AWS 19.5	5.445
AWS 24	6.495
Magazines
4 rnd	0.280
10 rnd	0.205
Muzzle Brakes
Millennium 3/4-28	0.330
Millennium 9/16-24	0.270
WCI 3/4-28	0.365
WCI 9/16-24	0.400
GDMR 3/4-28	0.170

• HAND GUARDS
  • Tactical and Hunter- Carbine or Mid Length A2 profile, thermo plastic with heat shields
  • Tactical Rail- Midwest Industries four railed picatinny type 6061 annodized 2 piece
  • Entry and Overwatch- Rifle Length free float G10 FR4 composite tube with 7075 aluminum alloy barrel nut
  • AWS- Midwest Industries four railed picatinny type 6061 annodized free float
• BARREL

	Tactical	Advantage
Material	CrMoV+Cr Lined	Stainless
Diameter under hand guard	0.730	0.870/0.890
Diameter at gas block	0.750	0.907
Muzzle thread	9/16-24tpi	3/4-28tpi
Rifling	6 groove	6 groove
Twist rate	1 in 7.5	1 in 9

• GAS SYSTEM

	Carbine	Mid	Rifle
Tactical 10.5/14.5	X
Tactical 16		X
Advantage			X

• BOLT
  • Standard: ASTM 9310 equivalent surface refined case hardened peened and phosphated
  • Hard use: ASTM 9310 equivalent triple tempered surface refined hardened and peened with IonBond DLC coating
• BARREL EXTENSION
  • Grendel specific
• UPPER
  • 7075-T651 forged Grendel specific ejection port
  • Monolithic receiver rail system 7075-T651 alloy annodized type 2 class 3
• LOWER
  • 7075-T651 forged, AR15 style
• CARRIER
  • Internally honed and hard chromed, M16 type, ATF approved