REXUS UltraBCG 6.5 Grendel | 6mm ARC | 22 ARC Bolt Carrier Group

Our bolt carrier group is the pinnacle of 6.5 Grendel / 6mm ARC / 22 ARC bolt carrier value. We start with our M16-style idiot-proof bolt carrier made for us by a respected industry leader in the bolt carrier business. Then add our industry-leading Ultrabolt (an improved bolt body plus improved extractor) that is the strongest .136 Type 2 65G/6A/22A bolt shooters can get. To finish it off, we add the pins kit — mil-spec firing pin, firing pin retainer pin, cam pin — to make a complete 6.5 Grendel / 6mm ARC / 22 ARC bolt carrier group.

BOLT CARRIER

• Carrier body machined from aircraft-quality 8620 steel, with a black nitride surface finish for all-weather durability
• M16-style; for semi-auto shooters, this refers to the weight of the carrier relative to tuning your action's gas-system functioning; the weight of an M16-style carrier provides a well-balanced system — not-too-heavy, not-too-light — and is the industry standard to which other carrier weights refer
• Carrier key machined from 4130 steel, black nitride surface finish, properly staked using Grade 8 screws
• Carrier has 19 serrations on the tail where they belong to work with a forward assist, and none on the head where they would only make a jam worse (removing serrations from the head makes these carriers idiot-proof)
• You get the added benefit of not having to pick grit and crap out of the serrations that are exposed to the elements in the ejection port — and there are no serrations to shuck that grit and crap back into the receiver every time the bolt cycles. Just wipe clean!
• Finally, and most important, slick-sided carriers make Eugene Stoner smile from his grave, presenting a smooth retro look as he intended, for St. Stoner was mightily displeaseth by the heretical forward assist "General Wheeler Button." (Just to be clear, our carriers DO work with forward assists because they keep the serrations on the tail where they'll actually do some good — best-of-both-worlds kind of thing.)

BOLT

• UltraBolt body machined from 9310 VAR (Vacuum Arc Remelt) steel by the original manufacturer chosen by 6.5 Grendel engineer Bill Alexander, expertly heat treated (the secret to 9310's superior performance is in the heat treat), black nitride surface finish
• Our exclusive UltraBolt bolt body is engineered with a couple of proprietary strength-improving elements that nobody else has — at any price. At our price, these are a STEAL!
• Our exclusive UltraBolt extractor is machined to our proprietary strength-improving design from 4140 steel, mil-spec shot-peened (we don't cut corners on this important step to help prevent micro-cracks from starting) and with a manganese phosphate surface treatment to resist the elements
• Our fully-assembled bolts, of course, include mil-spec extractor spring, insert buffer, Navy SEALs Crane-quality Viton® O-ring, pivot pin, and ejector pin and spring
• Bolt has a Mk136 .136 boltface counterbore (otherwise known as Type 2); make sure your barrel is headspaced for a Mk136, Type 2, 6.5 Grendel / 6mm ARC / 22 ARC bolt

PIN KIT

• Our complete bolt carrier groups, in addition to the bolt carrier and bolt, include a hard-chromed firing pin, firing pin retainer pin, and cam pin made of superior 4340 steel with a black nitride surface finish

WEIGHTS

• Carrier, 9.7 oz
• Only Carrier and Bolt, 11.2 oz
• Complete Bolt Carrier Group with Pins Kit, 11.8 oz