The CQB Pro is as the name implies our shortest, most handy upper in our Pro lineup. This 10.5" upper is designed to be as tough and reliable as it can be within the short length envelope. Rosco Bloodline Barrels provide the accuracy and soft shooting performance you should expect. The BCGs are the top of line NIB Toolcraft BCGs, some of the best on the market. For the rail we went with one of the strongest in the market, The Geissele MK4. The CQB was not designed to be the lightest upper, but the strongest and most durable for the hardest use cases you can think of.
***Each Upper is Laser Engraved/Serialized 1-15 by Rosco at The Factory***
*Alternate Muzzle Devices Available Upon Request After Purchase*
10.5" Rosco Bloodline 5.56 1:7 Twist 4150 CMV Barrel, Geissele 9.3"MK4 Handguard, Toolcraft NiB BCG, Mil-Spec Upper, Breek Warhammer Charging handle & SI Cloak Flash Hider
Pinned Gas Block, Lapped Upper Receiver, Bedded Barrel, Every component is hand fitted and tested prior to assembly, test firing, and ultimately shipping.
Manufacturer - Rosco
Length/Chamber - 10.5" 5.56
Twist - 1:7 Twist
Material - 4150 CMV
Profile - M4
Gas System - Carbine-Length
Finish - Nitride
Thread Pitch - 1/2x28
Gas Port - .073
Weight - 19.25 oz
*Pinned Gas Block*
1st Rebarrel - FREE
All NFA/ATF Rules Apply
Barrel nut is sequentially torqued down to 50 FT-lbs. Starting at 25, then 35, and then finally 50 FT-lbs to ensure proper mating of the threads.
Barrel is also bedded to the upper receiver with an expanding/hardening compound to ensure perfect fit and reliable accuracy.
If you legit burn out a barrel, like 10,000 -25,000 rounds, and the barrel becomes inaccurate I will rebarrel it for you for free. Good luck.
Bolt Carrier Group:
Manufacturer - Toolcraft
Bolt Material - 9310 Alloy
Carrier Material - 8620 Alloy
Gas Key Material - 4130 Alloy
Profile - Full Auto
Finish - Nickel Boron
Gas Key Screws - Grade 8 (torqued and staked to Mil-Spec)
Forward Assist Cuts
Mil-Spec Firing Pin (Hard Chrome Coated)
Viton O-Ring Enhanced Extraction
Manufacturer - Geissele
Length - 9.3"
Material - 6061 T6 Aluminum
Finish - Hard Coat Black Anodization
Mounting Platform - Mlock/Quad
Barrel Nut - Geissele Proprietary (does not require timing)
Barrel nut torqued to 50 FT-lbs
Handguard screws torqued to 96 IN-lbs with blue Loctite
We apply a Permatex Anti-Seize solution to the receiver extension before installing the barrel nut to ensure they do not lock up over many years of hard use.
Manufacturer - 17 Design
Material - 7075 T6 Aluminum
Machined from Forged Aluminum
Finish - Type 3 Hardcoat Anodized Black
Standard Forward Assist
Standard Dust Cover
M4 Feed Ramps
NOT T-Marked, if you care...
Manufacturer: Breek Arms
Material: 7075 T6 Aluminum
Machined from Forged High Strength 7075 Aluminum
Finish - Type 3 Hardcoat Anodized
Material - 4140 Steel
Style - Low Profile
Size - .750"
Attachment Method - 2x Set Screws + Steel Roll Pin
Dimpled to barrel
Set screws are torqued to 25 IN-lbs and have High-Temp threadlocker applied for extra security.
*Please contact before attempting removal of the Gas Block. These are not meant to be tampered with.
Length - Carbine
Material - Stainless Steel
Finish - Black Nitride
Manufacturer - Strike Industries
Cloak - 4-Prong Flash Hider (expect some minor tuning fork ringing)
Material - 4140Steel
Thread Pitch - 1/2x28
Caliber - .223/5.56
The Build Process:
Every upper is assembled by me, one at a time. Every piece is hand fit, barrels to the uppers, gas blocks to the barrels, gas tubes to the blocks, handguards, roll pins. If something doesn't fit properly and securely, I don't put it together. What that means is that you get an upper where every component fits together like a glove for a rock solid build that won't fall apart or tear itself asunder during hard use.
On top of that we use the proper threadlocker on the appropriate parts. We use blue loctite on the handguard screws and then torque them to 60 IN-LBS. On the gas block screws we torque them to 25 IN-LBS then use a red high temp threadlocker (#272) to ensure the gas block never shifts. #272 threadlocker holds its strength up to 450 degrees VS. the 300 degrees of standard loctite.
We don't use the high temp threadlocker on the flash hider or the barrel nut. We can if you ask us to, I don't have a problem with that. But, it is not needed. 50 FT-lbs on the barrel nut is more than enough and the flash hider is timed with a crush washer and can be easily swapped out for your favorite device if you so desire.
CQB Pro - 10.5" 5.56 Complete Upper Receiver - Pinned Gas Block
Our stated policy is to not accept returns, but if you accidently ordered the wrong item or there was a mistake or if you have any issue at all send us an email (listed in the "contact us" section) and we will work it out.