Pistol Caliber Billet AR-9/45 “Slick Side” Upper with LRBHO (Last Round Bolt Hold Open)
Manufacturer: New Frontier Armory
Model: Pistol Caliber Billet AR-9/45 “Slick Side” Upper with LRBHO — PATENT PENDING
Caliber: Multi (will accept any barrels, bolts and caliber designed for the AR-9/45 style platform)
Weight: 8.96 oz
Measurements: 7.662? x 1.375? x 2.314?
Other Specifications and Features of the Billet AR-9/45 “Slick Side” Upper with LRBHO:
- Machined from 7075 T6 aircraft grade billet aluminum
- Matte black hard-coat anodized per Mil 8625 Type 3 Class 2
- Compatible with all standard AR-15 / AR-9 components and most aftermarket parts
- Manufactured to MILSPEC on state of the art CNC equipment for consistent quality parts and exacting tolerances
- Save money by building your own AR-9 rifle or pistol from the ground up exactly the way you want it configured
- Designed to match lines with New Frontier Armory C-9 & C-45 Billet Lower
integrated Last Round Bolt Hold Open (LRBHO) technology (PATENT
PENDING) that reliably holds the bolt open when magazine is empty
- LRBHO feature is designed for lowers that accept Glock style magazines
- **NOTE — This upper is not machined for a gas tube as it is intended for blowback gas systems only
Once assembled the small “hook” end of the wire form in
the upper should be pushed up by the follower of an empty Glock magazine
which will engage the bolt catch on the last round fired to hold the
bolt in the locked position. If it does not engage, or engages before
the last round is fired you can make VERY SMALL adjustments by SLIGHTLY
bending the “hook” end down to lock faster or up to lock slower. They
are set and function checked during assembly with brand new Glock
magazines and our standard bolt catches. Because of varying magazine
specs, magazine specs changing over the life of the product, different
thicknesses of the pad on the bolt catch and other variables, this
adjustment may be necessary with your specific parts.
Some rail systems that use anti-rotation tabs may need slight
modification to fit this upper. It is designed for flush mounting rails
and standard hand guards.
The New Frontier Armory Pistol Caliber Billet AR-9/45 “Slick Side” Upper with LRBHO is proudly MADE IN THE USA by hard working American men and women.