Rifle Barrel Extension Parts US Specifications
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 Failzero Ar 15 Exo Barrel Extension Steel Nickel US Specifications
USD 27.99
(Indicative price - actual current price possibly lower)
Technical data & information: M4-type barrel extension has a self-lubricating exo-treated nickel boron finish that aids in smooth, consistent feeding and helps prevent hang-ups. High-tech coating lasts the life of the weapon, and won't rub off, flake off, or gall. Helps dissipate heat for cooler operation, too. Precision machined from 8620 steel to usgi specifications with integral m4-type feed ramps and predrilled locator pin hole. Mfg: failzero specs: 8620 carbon steel, exo-treated nickel boron finish. .998" o.D., 1.168" shoulder o.D. .8125"-16unf thread. Barrel locator pin required, available separately. US specification & reliable quality rifle barrel extension parts by Failzero. Part Nr: EXOBRLEXT01.
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Bat Machine Ar .308 Ar Style .308 Extension Steel Unfinished US Specifications
USD 59.99
(Indicative price - actual current price possibly lower)
Technical data & information: Machined 4140 chrome-moly steel barrel extensions help the custom rifle builder ensure a secure barrel fit for best alignment and accuracy. Heat treated for surface hardness to give years of reliable service. Available for m4 carbine extension with feed ramp cuts. Ar-style .308 extension fits the dpms lr-308 and other .308s with the same thread pattern, plus it offers m4-style feed ramp cuts to ensure extra reliability in getting rounds from the magazine to the chamber. All models have pre-drilled locator pin hole. Mfg: bat machine specs: 4140 chrome-moly steel, in-the-white. Ar-style .308 -1.200" o.D., .940" i.D., w/m4-style feed ramps. Fits dpms lr-308, remington r-25, and other ar-style .308 rifles with same receiver thread pattern. US specification & reliable quality rifle barrel extension parts by BAT. Part Nr: 100-005-266.
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Brownells Ar 15 M4 Barrel Extension Steel Unfinished US Specifications
USD 21.99
(Indicative price - actual current price possibly lower)
Technical data & information: Specifically designed for carbine installations, this is a correct-spec m4 barrel extension with feed ramp and pre-drilled hole for locator pin. Perfect for custom builds, rebarreling jobs, and caliber conversion projects. Integral feed ramp is required for proper chambering in carbine configurations and adds an extra measure of insurance for smooth, reliable feeding in rifles. Fully machined from high-grade 4140 chrome-moly steel for precise fit, strength, and durability. Mfg: brownells specs: 4140 carbon steel, in-the-white. US specification & reliable quality rifle barrel extension parts by Brownells. Part Nr: 080-000-574.
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Whitworth Tool Ar 15 M4 Barrel Extension Steel Unfinished US Specifications
USD 19.99
(Indicative price - actual current price possibly lower)
Technical data & information: Economical, high-quality m4 barrel extension is machined to mil-spec standards with integral feed ramps and predrilled locator pin hole for fast, easy barrel installations. Machined from 8620 steel and head-treated for additional surface hardness to resist erosion by hot combustion gases for years of reliable service. Great for custom barrel jobs and caliber conversions. Mfg: whitworth tool, inc. Specs: 8620 steel, in-the-white. .8125"-16unf thread. Barrel locator pin required, not included. US specification & reliable quality rifle barrel extension parts by Whitworth. Part Nr: BXM4.
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