Bolt assembly machined from either Mil-Spec Carpenter 158 steel, shot peened for increased strength per Mil-Spec, includes Mil-Spec 4140 billet tool steel extractor w/ spring and viton o-ring, Mil-Spec ejector and spring. HPT (High Pressure Batch Tested) and MPI (Magnetic Particle Inspected). Comes Assembled. Specifications for Cryptic 6.5mm Grendel II Bolt Assembly – Complete: Manufacturer: Cryptic Finish: Chrome Plated Fabric/Material: 4140 Billet Tool Steel, Carpenter 158 Steel Cartridge: 6.5mm Grendel II Gun Make: AR Platform Gun Model: AR-15 Hand: Ambidextrous Included Accessories: Standard Weight: 2 oz Bolt Material: Steel Carrier Material: 8620 Steel Package Contents: Cryptic 6.5mm Grendel II Bolt Assembly – Complete Bolt Tool Steel Extractor Assembly (spring with viton insert pin extractor) Ejector Assembly (ejector spring roll pin) Gas Rings – Set of 3
5 reviews for Cryptic 6.5mm Grendel II Bolt Assembly – Complete
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Richard –
Item was difficult to find on other gun parts web sites. I was pleasantly surprised when I found it here and it was reasonably priced. I also liked the fact I was not charged until the item shipped.
Dharris –
Good quality,all works as intended, good price! Optics planet all ways have good deal and discounts I have saved a lot of money over the past few years by buying from them, and the have allways had goo customer service.
Justin T –
All I needed for my conversion. So I got it cleaned n lubed it threw it in the gun n it worked.
Judd –
Paired this Cryptic Grendel bolt with an 18" Faxon barrel, a Superlative Arms gas piston, and stuck it all in a Gibbz G4 side-charger. Flawless function with initial test firing. I absolute recommend it.
DougsAR838 –
I purchased this bolt assembly for my 6.5 Grendel type 2 build. It’s of the same quality as my other Cryptic bolt carrier groups. I ALWAYS verify the headspace on all my builds. This bolt passed with no issues. This bolt is everything that it’s advertised to be. I highly recommend Cryptic products. You can buy with confidence.