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Integrity Arms 9mm Upper/Lower Set w/LRBHO – Glock Mags

$279.95$379.95

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Description

Made for us by New Frontier Armory under an ATF variance to utilize our info engraved on the lower receiver.

Lower Receiver

  • Machined from 7075-T6 aircraft grade billet aluminum
  • Matte black hard-coat anodized per Mil 8625 Type 3 Class 2
  • Precision machined magazine well with beveled feed lip for easy mag swaps
  • Machined and engraved to be compatible with 45 and 60 degree short throw fire control selectors such as the BAD_ASS ST 45 Lever
  • Caliber marking of “Multi” so it can be used with different pistol caliber uppers
  • Compatible with most standard AR-15 components  and most aftermarket parts
  • Take down pin spring and detent hole is threaded for a 4-40 set screw for easy capturing (hardware included)
  • Upper tension screw behind grip screw (threaded hole with hardware included) to adjust any “slop” out of vertical fit between upper and lower
  • Ambidextrous trigger finger rests with grooves (above and below mag release / mag catch)
  • Threaded bolt catch pin (Threaded hole and hardware)
  • Integrated large opening “winter” trigger guard
  • Proprietary magazine catch assembly and ejector is included and installed at the factory
  • Manufactured to MILSPEC (where applicable) on state of the art CNC equipment for consistent quality parts and exacting tolerances
  • Save money by building your own AR-9 rifle from the ground up exactly the way you want it configured and shoot for less!

UPPER RECEIVER – Slick Side Billet

  • 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
  • Contains 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.

UPPER RECEIVER – Side Charging AR9

  • Machined from 6061 billet aluminum
  • Matte black hard-coat anodized per Mil 8625 Type 3 Class 2
  • Compatible with all Glock Mag AR-9 components and most aftermarket parts
  • Adjustable tension slide lock on charging handle
  • Rear dust cover trap door that seals shut when mated with lower
  • Manufactured to MILSPEC on state of the art CNC equipment for consistent quality parts and exacting tolerances
  • Save money by building your own AR pistol caliber rifle from the ground up exactly the way you want it configured
  • Designed to match lines with New Frontier Armory C-9 and C-45 Billet Lower and most forged lowers
  • **When using this upper for a 9mm or .40 build you must either use a carbine buffer with our buffer spacer, or a 9mm LONG buffer.  Not following these instructions could cause damage to the rear door of the upper that will NOT be covered under warranty**

FAQ:

QUESTION:   What type of magazines will fit in this lower?

ANSWER:   The lower was designed to fit and drop free factory Glock small frame pistol magazines.  It has also been thoroughly tested with Magpul GL17 9mm pistol magazines to fit and drop free.  Although it accepts and shoots other aftermarket magazines (Promag, KCI, Kahn, etc) some slight modification may be needed to get them to drop free from this lower because of the varying width measurement we have seen when checking these magazines to Glock factory specifications.

 

QUESTION:   Do you offer a reliable last round / empty magazine bolt hold open (LRBHO) System for this lower?

ANSWER:  YES — After watching several companies try and fail to incorporate a RELIABLE last round bolt hold open (LRBHO) system into their lower receivers we decided to take a different approach and will be incorporating our LRBHO technology (PATENT PENDING) in our matching upper receivers.  After rigorous testing and hundreds of hours of research and development we feel that this is the best option for LRBHO on a Glock magazine AR style firearm.  Our upper will be compatible with other manufacturers lower receiver that either don’t have a LRBHO or you can scrap the non-working LRBHO out of your existing AR-9 Glock Mag lower and solve the issue of not having a 100% functioning LRBHO.  For more information on our matching AR-9 Upper, please CLICK HERE.

 

QUESTION:   What bolt carrier group will work with a Glock magazine fed AR-9?

ANSWER:   You will need an AR-9 Bolt Carrier Group that has relief cuts to clear the Glock style magazines.  Both AR-9 BCG’s that we sell (CLICK HERE for AR-9 BCG’s) will work in both Glock style AR-9’s as well as traditional Colt style AR-9’s.  We can also modify your Colt style AR-9 BCG for you to work properly with both systems.  CLICK HERE for more details on that service.

 

QUESTION:  It seems as though my BCG may be hitting or rubbing the ejector on the lower, how can I fix that?

ANSWER:  Loosen the two screws holding the ejector in to where its a friction fit.  Ensure the ejector is seated all the way to the rear and all the way down in the pocket.  Close your upper onto the lower with the bolt all the way forward.  SLOWLY cycle the bolt in and out about 1/4 of the way back a few times then let the bolt close all the way and tighten the ejector screws.  They are cupped to get a good grab on the SS ejector, so only hand tight or you risk the chance of bending the ejector over.  Any slight rubbing at this point will wear in the ejector after a few magazines are cycled through the gun.  If you see excessive rubbing you can also file down the top corner on the left side of the ejector (shooters left)

 

QUESTION:   What LPK will work with this lower?

ANSWER:   Although we sell a specific LPK with just the parts needed to build the C-9 lower receiver HERE, any standard AR-15 LPK will work.  You will not need the magazine catch assembly, bolt catch roll pin, or trigger guard that are normally included with standard LPKs.

 

QUESTION:   Do I need to use a special buffer when I build my AR-9?

ANSWER:  Although its not technically required, it is advised that you either use a 9mm buffer (longer and heavier than carbine) or a spacer in your buffer tube before you place your spring in.  The reason for this is to limit the BCG travel to the rear so it doesn’t come back forward and smash the bolt catch hard enough to break it.  The 9mm BCG is shorter than a standard BCG.  You can use a carbine buffer with a spacer

Additional information

Choose Upper

Standard/Slick Side LRBHO, Side Charging LRBHO

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