RB MAC Parts is an outgrowth of our MAC Service and Repair Business. rbmacparts.com is not just another parts vendor.

I have 40+ years experience with MACs and many other post War automatic weapons. I am an Ingram SubMachine Gun Armorer, an American Gunsmithing Association Gunsmith, and Certified DuraCoat Applicator. My firearms business is parts and service for Ingram and Atchisson Patent Open Bolt SubMachine Guns (commonly called MACs or Ingrams) and Atchisson Patent Closed Bolt Semi-Autos (erroniuously called Cobrays).

RB MAC exclusive MAC/Ace Folding Stocks are available for ALL Models.

The RB MAC exclusive In-Line Variable Rate System is tunable from 500rpm to 2400rpm. Available for SWD M11/9 Open Bolt SubMachine Guns only.

All weapons and components are available CUSTOM ORDER in Matte Black (not Flat Black), HK Semi-Gloss Black, Black & Green Tiger Stripe or Urban MirageFlage Cammo DuraCoat Finish.


DO NOT BELIEVE ANY OF THE CRAP YOU HAVE READ ELSEWHERE ON THE INTERNET.

MAC OPEN BOLT SubMachine Gun parts DO NOT FIT or function in Closed Bolt Semi-Auto Pistols. Attempted fitting of Open Bolt Parts in Closed Bolt Guns will NOT make it a SubMachine Gun. Attempting to convert a Semi-Auto to SubMachine Gun is a Federal Felony.

THERE IS NO SUCH THING AS COBRAY FIREARMS. THERE IS NO SUCH THING AS A MAC-9 or MAC-11.

Read the MANUFACTURER'S Model, Name and Address, stamped on the Right Side of the Lower Receiver, BEFORE ORDERING PARTS.

Then select your Model from the Catagories at left.

E-mail any questions about models and applications to: bob@rbmacparts.com before you order.


Parts for NFA Registered SubMachine Guns are NOT legal for sale in all States. Some parts for Semi-Autos are NOT legal for sale in all States or Municipalities. RB MAC does NOT offer Firearms Parts for sale in States or Municipality where such parts are not legal for sale. You stipulate, by placing your order, that it IS legal for you to purchase the Firearms Parts you have ordered, in your State & Municipality of Residence.

This applies not just to SMG Parts but Threaded Barrels, 30, 32 and 36 round Magazines, Stock Assemblies and numerous other parts or systems. You are responsible for knowing the Federal, State and Municipal Laws that govern you.

See the Ordering · Shipping · Returns Page.

E-mail: bob@rbmacparts.com before you order, if you are unsure of your delivery status. Even so, it is NOT RB MAC's responsibility to determine what is legal for you to purchase or possess in your State and Municipality.

All NFA Rules apply.

RB MAC Parts Catalog
MAC Parts Catalog

40 page MAC Parts Catalog, for ALL MACs, Open Bolt SMGs and Closed Bolt Semi-Autos.

9.95
BUY NOW

THE LAST BUFFER YOU'LL EVER BUY!
RB MAC buffer

RB MAC Exclusive BUFFER
for M11/9 SMG and Semi-Auto Pistols

1/2" thick HDPE Space Age Polymer. The same material as used on Indy car and Formula 1 rub-blocks. Self-healing, fluid under pressure, impervious to chemicals and takes heat up to 1200°f without molecular change. WILL NOT WEAR OUT, ROT OUT, or loose elasticity. Improves lock time in Semis. Increases cyclic rate to about 1600rpm in SMGs. Put two in your SMG and increase cyclic rate to 2000rpm+.

24.95
 BUY NOW

2 for 44.95
BUY NOW

RB MAC Exclusive
BIG MAC BOOKs
BIG MAC Book, M10 SMG Armorer H.B.,M10 Semi Armorer's H.B.

RB BIG MAC BOOK
for MAC10 & M11 Open Bolt SubMachine Gun Operators
RPB Open Bolt Semi
and Closed Bolt Semi-Auto Shooters.

RB MAC exclusive RB BIG MAC BOOK is the definitive resource for all FAT MACs: M10 & M11 SubMachine Guns, M10/45s and MPA10s. 186 pages of information on Fire Control System, Trouble Shooting, Ammo, Magazines, Maintenance, and Suppressors. Plus Operation Diagrams and Schematics. Sections on Open Bolt SMG and Closed Bolt Semi Pistol, with Manuals for both, and Complete Parts Lists. Tips from Robert Burrows' 40+ years experience with MACs. Soft Cover, Comb Bound, 8.5"x11" with large clear type.

34.95
BUY NOW


RB MAC
M10-M11 OPEN BOLT SUBMACHINE GUN ARMORER'S HANDBOOK

RB MAC exclusive RB M1O OPEN BOLT SUBMACHINE GUN ARMORER'S HANDBOOK is for the sporting arms gunsmith, or experienced amateur gunsmith. Covers in depth MAINTENANCE and REPAIR for the Ingram Patent Model 10 .45acp & 9mm and the M11 .380acp Open Bolt Open Bolt SubMachine Guns.

24.95
BUY NOW


RB MAC
M10/45 CLOSED BOLT SEMI-AUTO ARMORER'S HANDBOOK

RB MAC exclusive RB M10/45 CLOSED BOLT SEMI-AUTO ARMORER'S HANDBOOK is for the sporting arms gunsmith, or experienced amateur gunsmith. Covers in depth MAINTENANCE and REPAIR for the following Atchisson Patent Closed Bolt Semi-Auto Guns: S.W.Daniel, Leinad, FMJ M10/45, MP10/45s, etc and MasterPiece Arms MPA10s.

24.95
BUY NOW

RB MAC Exclusive
Little MAC BOOKs
LITTLE MAC Book, M10 SMG Armorer H.B.,M10 Semi Armorer's H.B.

RB MAC
RB Little MAC BOOK

for M11/9 Open Bolt SubMachine Gun Operators
and Closed Bolt Semi-Auto Shooters

RB MAC exclusive RB LITTLE MAC BOOK is the definitive resource for all M11/9s, M11/9 SubMachine Guns and MPA30s. 168 pages of information on Fire Control System, Trouble Shooting, Ammo, Magazines, Maintenance, and Suppressors. Plus Operation Diagrams and Schematics. Sections on Open Bolt SMG and Closed Bolt Semi Pistol, with Manuals for both, and Complete Parts Lists. Tips from Robert Burrows 40+ years experience with MACs. Soft Cover, Comb Bound, 8.5"x11" with large clear type.

34.95
BUY NOW


RB MAC
M11/9 OPEN BOLT SMG ARMORER'S HANDBOOK
RB MAC exclusive RB M11/9 OPEN BOLT SUBMACHINE GUN ARMORER#39;S HANDBOOK is for the sporting arms gunsmith, or experienced amateur gunsmith. Covers in depth MAINTENANCE and REPAIR for the S.W.Daniel M11/9 9mm Ingram / Atchisson Patent Open Bolt Open Bolt SubMachine Guns.

24.95
BUY NOW


RB MAC
M11/9 CLOSED BOLT SEMI-AUTO ARMORER'S HANDBOOK
RB MAC exclusive RB M11/9 CLOSED BOLT SEMI-AUTO ARMORER'S HANDBOOK is for the sporting arms gunsmith, or experienced amateur gunsmith. Covers in depth MAINTENANCE and REPAIR for the following Atchisson Patent Closed Bolt Semi-Auto Guns: S.W.Daniel · M11/9 9mm & M12 .380 · Leinad M11/9 9mm & M12 .380 · FMJ M11/9 9mm, M12 & M12A1.380 · MasterPiece Arms MPA30 & MPA20.

24.95
BUY NOW

RB MAC Exclusive
MAC/ACE SIDE FOLDING STOCKS
for all MACs
MAC/ACE SIDE FOLDING STOCK

The RB MAC exclusive MAC/Ace Side Folder features the Ace Ltd Skeleton Stock & Folding Mechanism. It can be set up to fold LEFT OR RIGHT, and can be Adjusted Vertically up to 2.5" for proper sight line with Optics on Side Cockers. The stock is the same length, extended, as the original wire stock. Very rigid and extremely light. Weapon can be operated with stock folded. All CNC machined Aircraft Aluminum and Delrin, with soft butt pad. Flat black anodized. Simple two-screw installation on Semi-Autos. Easy 1-screw installation on SubGuns. Comes with hardware, tools, and simple installation instructions.

Comes with hardware, tools, and simple installation instructions.

M10 .45acp SEMI CARBINE
or SBR
249.95
BUY NOW

M11/9 9mm SEMI CARBINE
or SBR
249.95
BUY NOW

M10 .45acp SMG
249.95
BUY NOW

M10 9mm SMG
249.95
BUY NOW

M11/9 9mm SMG
249.95
BUY NOW

M11.380 SMG
249.95
BUY NOW

RB MAC Exclusive
In-Line Variable Rate System
for SWD M11/9 SubMachine Guns
In-line Variable Rate System

Variable Cyclic Rate from 500 to 2400 Rounds per Minute!
Almost no Felt Recoil. Dramatic Reduction in Muzzle Rise.
Sub 1" Groups at 35 yards on Semi. Aimed 5 Round Bursts from the Assault Position.

Includes: Extremely Effective 20 port MUZZLE BRAKE · Choice of Uppers, including a 10" BULL BARREL SIDE COCKING UPPER, with Picatinny Rail · NEW Modified Fixed Firing Pin BOLT · Modified RECEIVER · Buffer System ADAPTER. Choice of M4 HAND GUARDS, STOCK (M4 is Standard) and Forward Grip. Customized to Your Specifications. Optics Available.

NO Welding or Refinishing of the Receiver is required
Can be Converted Back in 10 minutes.

Starting at
995.95
1449.95 as shown
(without Optics)
Optics 45.00 to 1395.00

E-mail: bob@rbgmacparts.com for details and pricing.