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SI Defense Stainless Steel Bolt Catch Screws (2)
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Our Price: $12.00
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SI Defense stainless steel bolt catch screw used on SI Defense billet lower receivers instead of roll pin. Two screws per order.
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SI Defense .308 Stainless Steel Barrel Extension
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Our Price: $75.00
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SI Defense .308 Stainless Steel Barrel Extension is made from 416 stainless steel. ©DPMS compatible.
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Assembled aluminum charge handle for .308/7.62
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Our Price: $65.00
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Assembled aluminum charge handle for .308/7.62. Ready to slide in upper receiver, black.
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.308/7.62 Ejection Port Cover, assembled, included with pin and spring.
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Our Price: $45.00
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.308/7.62 Ejection Port Cover, assembled, included with pin and spring. Aluminum, anodized black.
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Forward assist, assembled, with spring
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Our Price: $25.00
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Forward assist, assembled, with spring and roll pin. Round-style, black
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AR-15 Carbine Length Gas Tube
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Our Price: $15.00
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AR-15 Carbine length gas tube. Will fit .3087.62 or .223/5.56 calibers.
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AR-15 Rifle Length Gas Tube
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Our Price: $18.00
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AR-15 Carbine length gas tube. Will fit .308/7.62 or .223/5.56 calibers.
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Yankee Hill Machine Flip Up Gas Block with .750 Bore with Bayonet Lug and Sling Mount
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Our Price: $105.00
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This sight serves as a gas block and also includes a flip-up sight. Flip up sights are perfect for back-up or for use as a co-witness with optics. The flip-up sight can easily be locked into position or folded down when not in use. Includes a bayonet lug and sling mount. Material: Steel with manganese phosphate finish.
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SI Defense Complete and Assembled .308/7.62 AR Bolt Carrier Group
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Our Price: $99,999,999,999,999.00
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Coming Soon!
SI Defense a produced a completely assembled, ready to install AR-308 Bolt and Carrier System. We have built the bolt from SAE 9310 and the bolt carrier from 416 stainless steel. This bolt is compatible with DPMS® 308 receivers and rifles. Upgrade your rifle with a much better This is our standard bolt carrier group for the SI Defense rifles. We chose the FailZero® coating for our line of larger frame rifles because the EXO coating technology is the best! Kit includes six critical parts that are treated with ;EXO Technology, a revolutionary surface technology that provides permanent dry lubricity, radically improves the performance of your AR-15 and eliminates the need to apply oil or grease to treated parts for the life of the weapon. Treated parts include; Bolt, Bolt Carrier, Hammer, Extractor, Cam Pin, Carrier Key. This kit has fired over 11K rounds in a standard anodized upper. Quality features include:
* Case Hardened, Shot Peened and MPI Bolt (Magnetic Particle Inspected)
* Bolt Material: SAE 9310
* Bolt Carrier Material: 416 Stainless Steel
* EXO Coated Bolt (40% more wear resistant than Chrome with a very Low Coefficient of Friction)
* Mil-Spec Gas Rings
* EXO Coated Carrier
* Chrome Lined Gas Key
* Gas Key Hardened to USGI Specifications
* Grade 8 Hardened Fasteners
* Mil-Spec Staked Gas Key
* Firing Pin and retainer
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FailZero 308 Ultimate Bolt Assembly
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Our Price: $99,999,999,999,999.00
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FailZero Ultimate Bolt Assembly
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