AB Prototype B-45 Threaded Barrel for SIG Sauer P320, .45ACP, 5.5", no LCI, Blue PVD, .578"-28
This is a new AB Prototype B-45 threaded barrel for the SIG Sauer P320 in 45 AUTO. This precision machined barrel is cut from 416 stainless steel and threaded .578"-28 (standard .45 thread). Tighter-than-factory tolerances, but still a direct replacement barrel for the SIG Sauer P320 45 Full Size Slides. Will work with the P320 45 full size slide ONLY. Will NOT work with X10, X5, M17 or other 9mm/.40 full-size (4.7" or 5.0") slides. Drop-in fit for reliability.
The .578"-28 thread is the standard thread for most .45ACP pistol accessories, i.e. suppressors, comps, thread protectors, etc. Our threaded barrels will allow compatibility with most 45 barrel accessories on the market.
Included with our threaded barrels is our thread protector comp. This muzzle device will add a bit of style and performance to your threaded pistol. Six flats make for easy installation. Manufactured in the USA from 1144 Cold Drawn Alloy Steel and Black Nitride (QPQ) coated for improved wear-resistance. Thru bore is .470". Thread protector comes in black only.
Please note this barrel WILL NOT fit X10s, X5s and similar P320s in 9mm, .40 or .357SIG. DOES NOT FIT X-Ten COMP (this pistol is designed for a 3.8" barrel only!). THREADED BARRELS ARE NOT LEGAL IN ALL STATES. Please be aware of state laws before ordering/installing.
Includes: 1 AB Prototype B-45 5.5" Threaded Barrel (.578"-28), .45ACP (NO LCI CUT), thread protector (black), Blue PVD. Factory grease may be present. No other parts are included.
Installation is available for an additional charge.
All AB Prototype manufactured products offer a limited 1-year warranty to the original purchaser covering defects in material or workmanship and only extend to replacement parts as originally provided and/or installed for the original purchaser. Warranty does not cover normal wear and tear or coatings. Any unauthorized work, installation, improper or unsafe handling or utilizing non-SAAMI, hand-loaded, reloaded and/or remanufactured ammunition will immediately void this warranty. No other warranties are given or implied.
COATING DISCLAIMER: BLUE PVD coating is not as tough as Black Nitride (QPQ) or Gold PVD coatings. Expect cosmetic wear. This will not affect function.
DISCLAIMER: AB PROTOTYPE IS NOT AFFILIATED WITH SIG SAUER®. These barrels are not manufactured, endorsed or warrantied by SIG Sauer®.
You can find our 10mm barrels here: A-10 BARRELS
