Quoted: I tried to run a search on these didn't find anything. Can anyone tell me if they have bought one of these uppers and the quality  of them. I am considering buying a complete upper and lower from   them. thank you

Hope this information helps you.
Here's some spec's / information on our shortest gas piston system.

O.C.C. (Offensive Compact Carbine) SPECIFICATION:
Barrel:
• 9.25” Heavy contour, Fluted to reduce weight and Heat
• 4150 Mil-B-1159F Vanadium Alloy (mil-spec, machinegun rated)
• Chrome Lined, and Manganese phosphate
• 5 groove (“5R” Polygonal), right-handed 1x7 twist, button rifled (Rock Creek Barrel Blank)
• Vortec, A2, or Krink Flash hiders
• P4 cut barrel extentsion

Chamber:
• 5.56mm Nato (.223 Cal.)

Method of Operation:
• Gas Piston operated, rotating bolt (short stroke gas piston system)
• Reversable gas piston / gas trap design (two modes of fire)
• C.R.O.S. (Corrosion Resistant Operating System)

(Chrome plated: Barrel, Gas Block/Tube, Gas Plug, Gas Piston, Bolt Carrier Assembly)

Bolt & Carrier:
• Chrome plated 8620 steel bolt carrier, heat treated / plated per Mil Spec.
• Chrome plated steel bolt, heat treated, to Mil-spec

Sights:
• Fixed removable A2 front sight assembly

Weight:
• Empty – 6.5 lbs

Length:
• Extended - 30.25”
• Collapsed - 26”

•Fixed “Stubby” stock: 26”

Upper Receiver:
• A3 Flattop, Forged 7075-T6 aircraft aluminum alloy
• Hard coat anodized per Mil Spec and Teflon coated black
• P4 feed ramp cuts in receiver

Lower Receiver:
• Forged 7075-T6 aircraft aluminum alloy
• Hard coat anodized per Mil Spec and Teflon coated black
• Semi-auto trigger and Full-auto (LEO/Military Only)
• Ambi-selector

Stock:
• Retractable 6 position stock (mil-spec tube)


Here are our results when chrono testing our O.C.C. gas piston 9.25".
The barrel used was a Rock Creek 1:7 4150 Vanadium barrel blank.
The "5R" rifling should increase to about 2400 FPS avg. per Mike Rock.
We will chrono test to validate soon.

9 ¼ POF Chrono Data

Conditions: Sunny Temp 90F
Equipment: CED Millennium Chronograph

9 1/4" w/Vortex
Distance 10ft
Green tip 62gr- 2506,2439,2463,2486,2450 Ave 2468fps
BH 77gr- 2317,2306,2339,2332,2331 Ave 2325fps


9 1/4" w/Krink 7.62 cone
Distance 10ft
Green tip 62gr- 2447,2413,2406,2444,2419 Ave 2425fps
BH 77gr- 2315,2298,2309,2307,2305 Ave 2306fps


We compared our O.C.C. to a RRA 16.5" upper.

Rock River 16.5
Distance 10ft
Green tip 62gr- 2889,2905,2911,2890,2885 Ave 2896fps
BH 77gr- 2674,2682,2681,2673 Ave 2677fps

Hope we provided all the information regarding our 9.25" gas piston system.
Best regards,

Frank
Patriot Ordnance Factory (POF-USA)