+1-800-504-5897 Help Center Check Order Status
About Us Policies Reviews How To
Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC, and to all U.S. Military APO/FPO/DPO addresses.

Enjoy our FREE RETURNS

We want to ensure that making a return is as easy and hassle-free as possible! If for any reason you are not satisfied with your purchase, simply return the item within 30 days of receipt, and we'll cover the cost of return shipping. Learn more about our Return Policy.

  • Entire Store
  • ...
  • Apparel & Footwear
  • Astronomy
  • Everything Else
  • Eyewear
  • Hunting Gear
  • Lab Equipment
  • Military Gear
  • Outdoor Gear
  • Photography Equipment
  • Police, EMS & Fire
  • Shooting
  • Sport Optics
  • Sports & Hobbies
TIP
Shopping Cart

Primary Weapons Systems MK111 Pro 11.85in Upper Receiver

Primary Weapons Systems MK111 Pro Upper Receiver, 11.85in, Black, PM111UA01-1F
Primary Weapons Systems MK111 Pro Upper Receiver, 11.85in, Black, PM111UA01-1F
Primary Weapons Systems MK111 Pro Upper Receiver, 11.85in, Black, PM111UA01-1F
Primary Weapons Systems MK111 Pro Upper Receiver, 11.85in, Black, PM111UA01-1F
1 of 3 images
Primary Weapons Systems MK111 Pro Upper Receiver, 11.85in, Black, PM111UA01-1F
Primary Weapons Systems MK111 Pro Upper Receiver, 11.85in, Black, PM111UA01-1F
2 of 3 images
Primary Weapons Systems MK111 Pro Upper Receiver, 11.85in, Black, PM111UA01-1F
Primary Weapons Systems MK111 Pro Upper Receiver, 11.85in, Black, PM111UA01-1F
3 of 3 images
Primary Weapons Systems MK111 Pro Upper Receiver, 11.85in, Black, PM111UA01-1F

Tap Tap to Zoom

Government Export Restriction Government Export Restriction
Government Restriction Government Restriction
Questions & Answers
Does it come with a charging handle?

It comes with a radian charging handle.

by flipo sangria, Verified Owner, May 7, 2021
See 2 More Answers
223 Wylde means? 223 and 5.56?

Barrel can shoot .223 and 5.56 ammo.
The .223 Wylde chamber is tighter tolerance like .223 but can handle 5.56 NATO. Generally 223 Wylde barrel can hold better chamber pressure than standard 5.56 chambered barrel so you get improved bullet velocity and accuracy compared to 5.56 barrel.

by panda, Verified Owner, June 20, 2021
View All Q&A You Have a Question? Ask!
Customer Reviews
Helpful Positive Review
Dependable and rugged by Neil, November 12, 2021
I beat on my stuff. I was the kids that left his new bike outside in the rain and had a flat tire weekly from skid outs. If I can count on it to survive my use I throw it away. The MK111 pro upper is one of my favorite go to units. If you like shooti...
Read More...
2/2 found this helpful
Helpful Positive Review
PWS quality for a great price by Wisco Guy, Verified Owner, December 12, 2021
This PWS upper is everything I expected and more considering it is the lowest price entry for PWS pistol/SBR uppers. The fit and finish is superb and matches well with PWS lowers. More importantly, the long-stroke piston system runs clean and reliabl...
Read More...
4/4 found this helpful
Read All 2 Reviews
Caliber:
.223 Wylde
Barrel Length:
11.85 in
Gas System Length:
Carbine Length
Barrel Twist Rate:
1-8
Handguard Type:
Free-Float
Muzzle Device:
A2 Flash Hider
Finish:
Matte
Color:
Black
Handguard Length:
11 in
Handguard Style:
Thin Rail
Gun Rail:
M-LOK
Condition:
New

Code: 2D5-UFH-RG36D-PM111UA01-1F

MPN: PM111UA01-1F

UPC: 811154030948

Product No Longer Available

Product Info for Primary Weapons Systems MK111 Pro 11.85in Upper Receiver

MK111 PRO Upper, 11.85in Barrel, .223 Wylde, 3-Setting Adjustable Gas System, A2 Flash Hiderimage

Package Contents:

  • Primary Weapons Systems MK111 Pro 11.85in Upper Receiver

Related Products to Primary Weapons Systems MK111 Pro 11.85in Upper Receiver

Image of Primary Weapons Systems MK111 MOD2-M, .223 Wylde, 11.85 in Upper Receiver Primary Weapons Systems MK111 MOD2-M, .223 Wylde, 11.85 in Upper Receiver (6) List: $1,499.95 (Save $100.00) $1,399.95 Best Rated
Image of Primary Weapons Systems MK111 MOD2-M, .223 Wylde, 11.85 in Upper Receiver Primary Weapons Systems MK111 MOD2-M, .223 Wylde, 11.85 in Upper Receiver (6) List: $1,499.95 (Save $100.00) $1,399.95 Best Rated
Image of Primary Weapons Systems MK111 MOD2-M, .223 Wylde, 11.85 in Upper Receiver Primary Weapons Systems MK111 MOD2-M, .223 Wylde, 11.85 in Upper Receiver (6) List: $1,499.95 (Save $100.00) $1,399.95 Best Rated
Image of Primary Weapons Systems MK111 MOD2-M, .223 Wylde, 11.85 in Upper Receiver Primary Weapons Systems MK111 MOD2-M, .223 Wylde, 11.85 in Upper Receiver (6) List: $1,499.95 (Save $100.00) $1,399.95 Best Rated
Image of Primary Weapons Systems MK116 MOD 2-M, .223, 16in Upper Receiver Primary Weapons Systems MK116 MOD 2-M, .223, 16in Upper Receiver (7) List: $1,499.95 (Save $100.00) $1,399.95 14% Coupon
Image of Primary Weapons Systems MK116 MOD 2-M, .223, 16in Upper Receiver Primary Weapons Systems MK116 MOD 2-M, .223, 16in Upper Receiver (7) List: $1,499.95 (Save $100.00) $1,399.95 14% Coupon
Image of Primary Weapons Systems MK116 MOD 2-M, .223, 16in Upper Receiver Primary Weapons Systems MK116 MOD 2-M, .223, 16in Upper Receiver (7) List: $1,499.95 (Save $100.00) $1,399.95 14% Coupon
Image of Primary Weapons Systems MK116 MOD 2-M, .223, 16in Upper Receiver Primary Weapons Systems MK116 MOD 2-M, .223, 16in Upper Receiver (7) List: $1,499.95 (Save $100.00) $1,399.95 14% Coupon
Image of Primary Weapons Systems MK111 MOD1-M .223 Wylde, 11.85in bbl Upper Receiver Primary Weapons Systems MK111 MOD1-M .223 Wylde, 11.85in bbl Upper Receiver (7) List: $1,209.95 (Save $80.00) $1,129.95 Best Rated
Image of Primary Weapons Systems MK111 MOD1-M .223 Wylde, 11.85in bbl Upper Receiver Primary Weapons Systems MK111 MOD1-M .223 Wylde, 11.85in bbl Upper Receiver (7) List: $1,209.95 (Save $80.00) $1,129.95 Best Rated
Image of Primary Weapons Systems MK111 MOD1-M .223 Wylde, 11.85in bbl Upper Receiver Primary Weapons Systems MK111 MOD1-M .223 Wylde, 11.85in bbl Upper Receiver (7) List: $1,209.95 (Save $80.00) $1,129.95 Best Rated
Image of Primary Weapons Systems MK111 MOD1-M .223 Wylde, 11.85in bbl Upper Receiver Primary Weapons Systems MK111 MOD1-M .223 Wylde, 11.85in bbl Upper Receiver (7) List: $1,209.95 (Save $80.00) $1,129.95 Best Rated
Image of Primary Weapons Systems MK109 MOD 2-M, .300 AAC Blackout, 9.75 inch Upper Receiver Primary Weapons Systems MK109 MOD 2-M, .300 AAC Blackout, 9.75 inch Upper Receiver (5) List: $1,499.95 (Save $100.00) $1,399.95
Image of Primary Weapons Systems MK109 MOD 2-M, .300 AAC Blackout, 9.75 inch Upper Receiver Primary Weapons Systems MK109 MOD 2-M, .300 AAC Blackout, 9.75 inch Upper Receiver (5) List: $1,499.95 (Save $100.00) $1,399.95
Image of Primary Weapons Systems MK109 MOD 2-M, .300 AAC Blackout, 9.75 inch Upper Receiver Primary Weapons Systems MK109 MOD 2-M, .300 AAC Blackout, 9.75 inch Upper Receiver (5) List: $1,499.95 (Save $100.00) $1,399.95
Image of Primary Weapons Systems MK109 MOD 2-M, .300 AAC Blackout, 9.75 inch Upper Receiver Primary Weapons Systems MK109 MOD 2-M, .300 AAC Blackout, 9.75 inch Upper Receiver (5) List: $1,499.95 (Save $100.00) $1,399.95
Image of Primary Weapons Systems MK114 MOD 2-M, .223 Wylde, 14.5in Upper Receiver 2 models Primary Weapons Systems MK114 MOD 2-M, .223 Wylde, 14.5in Upper Receiver (2) List: $1,499.95 (Save $100.00) $1,399.95
Image of Primary Weapons Systems MK114 MOD 2-M, .223 Wylde, 14.5in Upper Receiver 2 models Primary Weapons Systems MK114 MOD 2-M, .223 Wylde, 14.5in Upper Receiver (2) List: $1,499.95 (Save $100.00) $1,399.95
Image of Primary Weapons Systems MK114 MOD 2-M, .223 Wylde, 14.5in Upper Receiver 2 models Primary Weapons Systems MK114 MOD 2-M, .223 Wylde, 14.5in Upper Receiver (2) List: $1,499.95 (Save $100.00) $1,399.95
Image of Primary Weapons Systems MK114 MOD 2-M, .223 Wylde, 14.5in Upper Receiver 2 models Primary Weapons Systems MK114 MOD 2-M, .223 Wylde, 14.5in Upper Receiver (2) List: $1,499.95 (Save $100.00) $1,399.95
Image of Primary Weapons Systems MK116 MOD1-M 16 inch .223 Wylde Upper Receiver Primary Weapons Systems MK116 MOD1-M 16 inch .223 Wylde Upper Receiver (4) List: $1,209.95 (Save $80.00) $1,129.95 14% Coupon
Image of Primary Weapons Systems MK116 MOD1-M 16 inch .223 Wylde Upper Receiver Primary Weapons Systems MK116 MOD1-M 16 inch .223 Wylde Upper Receiver (4) List: $1,209.95 (Save $80.00) $1,129.95 14% Coupon
Image of Primary Weapons Systems MK116 MOD1-M 16 inch .223 Wylde Upper Receiver Primary Weapons Systems MK116 MOD1-M 16 inch .223 Wylde Upper Receiver (4) List: $1,209.95 (Save $80.00) $1,129.95 14% Coupon
Image of Primary Weapons Systems MK116 MOD1-M 16 inch .223 Wylde Upper Receiver Primary Weapons Systems MK116 MOD1-M 16 inch .223 Wylde Upper Receiver (4) List: $1,209.95 (Save $80.00) $1,129.95 14% Coupon

Primary Weapons Systems MK111 Pro 11.85in Upper Receiver Unavailable & Discontinued Models

List of Unorderable Models

  • Primary Weapons Systems MK111 Pro Upper Receiver, 11.85in, Black, PM111UA01-1F , MPN: PM111UA01-1F , UPC: 811154030948 , Code: 2D5-UFH-RG36D-PM111UA01-1F
  • DEMO, Primary Weapons Systems MK111 Pro Upper Receiver, 11.85in, Black, 19-PM111UA0B , MPN: 19-PM111UA0B-DEMO , Code: 2D5-UFH-RG36D-19-PM111UA0B-DEMO
Compare (0)
1 item has been added
Add at least two items to compare
Last updated 2026-07-07 UTC.