A German company called Norlite makes carbine conversion upper receiver units designed to be used with Glock pistol frames. When assembled together, the Norlite USK-G kit and Glock frame make a fixed barreled, blowback-operated, Glock magazine fed pistol caliber carbine. Let’s take a closer look.

The receivers of USK-G kits are made of aluminum with protective lacquer coating over hard coat anodized finish. There is a continuous top Picatinny rail on top of the receiver and M-LOK slots on the sides of the handguard portion. The muzzles are threaded with metric 15×1 thread pitch. The rear of the receiver is threaded with AR-15 buffer tube threads and can be retrofitted with any AR-15 stock. There is also an option of installing a plug with a sling swivel instead of the AR buffer tube. The non-reciprocating folding charging handle is located on the left side of the receiver and the charging handle slot allows to lock the bolt back.

The Norlite USK-G conversion kits are compatible with the following models of Gen 3, Gen 4 or Gen 5 Glock pistols: G17, G19, G45, G34, G22, G23, G24, G35, G31 and G32. These kits are available in the following configurations:

Standard: Length – 465mm (18.3″); Barrel length – 294mm (11.6″); Weight – 2,950g (6.5lbs)

Length – 465mm (18.3″); Barrel length – 294mm (11.6″); Weight – 2,950g (6.5lbs) Compact: Length – 420mm (16.5″); Barrel length – 254mm (10″); Weight – 2,780g (6.13 lbs)

Length – 420mm (16.5″); Barrel length – 254mm (10″); Weight – 2,780g (6.13 lbs) Compact-D: Length – 420mm (16.5″); Barrel length – 228mm (9″); Weight – 2,690g (5.93 lbs)

Length – 420mm (16.5″); Barrel length – 228mm (9″); Weight – 2,690g (5.93 lbs) Sub-Compact: Length – 380mm (15″); Barrel length – 214mm (8.4″); Weight – 2,650g (5.84 lbs)

The dimensions do not include the length and weight of the stock and muzzle device. The Compact-D uses the compact receiver but has a shorter barrel and no muzzle threads to comply with the German legislation.

The installation of the Glock frame into Norlite USK-G receiver requires no modifications to the pistol’s frame. In order to install it, you need to disassemble the Glock pistol and USK-G receiver, insert the supplied feed ramp into the Glock frame, slide the frame into the stripped USK-G receiver and assemble the latter. The installation process is shown in the below embedded video.

It looks like the frame attachment is quite a robust design because the frame is fixed into the receiver both via the frame rails and the accessory rail. Note also that there is a separate part inserted into the front portion of the frame to support the pistol’s recoil spring cavity/dust cover.

The base price of Norlite USK-G conversion kits is €1,280 (about $1,380) to €1350 ($1,460) depending on the model/size. There is an online configurator on the company’s website that allows choosing the caliber and Glock pistol model as well as adding features and accessories to the basic kits. There is no information concerning the availability in the US.

Images from www.norlite.de