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BRP CORP |
Full-Length MG42 SEMI AUTO Receivers Back in Stock
$1700 (FFL required)
SPECIAL: If you buy a parts kits, you can get an MG-42 Semi-Auto Receiver for $250 off: ($1450)
MG 42 Parts Sets
- Sheet metal receiver with original front bushing installed
- The rear has been machined for buffer but the buffer tabs are not installed
- The rail mount holes and D cuts are already done
- The trunion cutouts are done
- The trigger pack cutout in to our Semi Auto standard using the back of the ejection port.
- The holes for the barrel door assembly, barrel stop, rear sight, and front tripod mount are properly located and rivet-ready.
- The ratchet plate with original bump pattern is included but not installed
- The buffer tabs are included but not installed
- The buffer latch stud is included but not installed
- Includes complete rivet kit
- The MG42 SA blocker bar is included but not installed
Operations Necessary to Complete the MG-42 SA Receiver:
1) Cut bottom profile for the Semi Auto Blocker Bar (Drawing Supplied). Tools needed: .5 endmill & .375 endmill. Weld the semi auto Blocker Bar into the rear of this slot as shown on drawing.
2) Install Buffer Tabs: Align the top and bottom tabs with the cutouts in the receiver, then rivet or weld them in place. You may have to trim them to get a tight fit.
3) Install Buffer Latch Stud: Set and weld the buffer latch stud in the hole provided under the bottom buffer tab
4) Rivet or weld the trigger housing mount bracket/rear tripod mount to the receiver.
5) Fit trigger housing to receiver
6) Make the cutouts for the charging handle in the receiver (Drawing Supplied)
7) Install the Ratchet Plate by welding it to the side of the receiver making sure that the 'bumps' are aligned with the corresponding
pattern in the receiver. Once attached, use the proper T-slot cutter to cut the charging handle track (Drawing Supplied).
Charging Handle / Ratchet Plate Cutout Print (Click ot download pdf)
8) Fit and install the trunion at center of the buffer and front receiver bushing. The trunion must fit tight to the receiver, so be sure not to remove too much material from top and bottom of the receiver when fitting the trunion. You should initially install the trunion using the trunion screw provided to verify fit and function before riveting it to the receiver.
9) Rivet or Weld Rails to the Receiver: This is the most critical operation. The rails must be parallel, properly spaced, and in perfect alignment w/ the trunion. Make sure that the left rail location does not interfere with the recuperator. You should initially install the rails with Cleko rivets or other fasteners to verify fit and function before riveting them in place.
10) Install the 'U' shaped barrel stop bracket and front tripod mount using the holes in the receiver and rivets provided. The bottom rivet on this parts also holds the front tripod mount.
11) Install the Barrel Door Assembly: You must first weld-in the upper and lower barrel door support brackets making sure that the hinge holes in the brackets are aligned with the hinge holes in the receiver. Use the squeeze rivets provided to attach the barrel door.
12) Install recuperator assembly to fit into the Semi Auto Blocker Bar and rear of the trigger housing mount brkt. You will need to drill a hole through the receiver for the rear recuperator screw
13) Install front & rear sight assemblies








MG42 SEMI AUTO KIT ($2475)
The kit includes all of the parts we use to assemble a functional MG-42 Semi Auto:
1) Full-Length MG-42 Semi-Auto Receiver (same as above)
Trigger Housing Brkt / Rear Tripod Mount
Buffer Tabs w/ rivets
Buffer Latch Assembly
Rails w/ rivets
Ratchet Plate
Trunion with rivet and screw setups
Quick-Change Barrel Door with rivets
Barrel Stop with rivets
Rear Sight Assembly
Front Sight Assembly
Front Tripod Mount
Semi Auto Blocking Bar
2) Complete Assembled Bolt
3) Complete Assembled Trigger Pack (original grips must be fit)
4) Buffer & Butt Stock (wood)
5) Charging Handle
6) Semi-Auto Mainspring
7) Top Cover and Feed Tray (8mm WW2)
8) Barrel (Yugo 8mm)
9) Bipod (Yugo adjustable)
10) Recuperator Assembly (requires modification) w/ hardware
11) Flash-Hider/Booster Assembly
12) Copy of ATF letter approving this configuration

(Bipod included but not shown)

MG42 SEMI AUTO Rear Receivers $825 (FFL required)
- The rear has been machined for buffer but the buffer tabs are not installed
- The rail mount holes and D cuts are already done
- The trigger pack cutout in to our Semi Auto standard using the back of the ejection port.
- The ratchet plate with original bump pattern is included but not installed
- The buffer tabs are included but not installed
- The buffer latch stud is included but not installed
- Includes complete rivet kit for rear parts
- The MG42 SA blocker bar is included but not installed





Extra-Heavy AR Hammer Spring (for Yugoslav and other hard-primered ammo): $8
Medium-Heavy AR Hammer Spring (for Romanian and other standard military ammo): $8
Semi Auto Bolt Parts


Reference Rear MG-42 Receiver Piece ($15)
This is a 5 inch section of stripped receiver in the ratchet plate area.
The rear section with the original markings as been cut away, the rear trigger housing mount has been removed, and the ratchet plate has be ground when we removed the rails.



1) New production Ratchet Plate made to original specifications: $50
2) World War 2 mfg rails stripped from original guns: $35 per set
3) MG-34/42 Tripod mount pin: $20
4) Rail Rivets: $4 per set of 10
5) Trunion Rivets: $3
6) Trunion Screw & Nut: $6
7) Barrel Door Rivets: $20 for 2
8) Front Sight Rivets: $15 for 2
9) Cocking Handle WW2: $55, Yugo $45
10) Trigger Housing with grips: $155
11) Sear Trip/Release with Spring: $10
12) Sear with Spring: $10
13) Firing Pin: $10
14) Ejection Port Cover and Pin Assy: $10
15) Short Recoil Assembly With Screws and Nuts: $85
16) Feed Cover complete with Feed Tray (WW2 Markings) $160.00, Yugo $120
17) Bipod Yugo: $85, German WW2 $115
18) Rear Buffer Tabs (new production): $30
19) Buffer Latch Stud (new production): $10
20) MG-42/53/3 Short Recoil Screw Set: Front Post, Rear Post and 2 nut (new production): $40
21) Mainspring WW2: $15
22) MG-34/42 Trigger Housing Pins (1 male, 1 female): $8 per set
23) Trigger Housing Pin (hitch style): $8
24) Buffer Assembly 8mm WW2: $50
25) Bakelite Grips with screws WW2: $75 red, $100 for black or brown
26) Front Sight Assembly WW2 (Front Sight w/ spring & plunger, Flash-Hider Latch, and Base): $50, early pattern: $75
27) Front Recevier Bushing WW2: $125
28) Rear Sight w/ Pin WW2: $30
29) Rear Sight Base WW2: $30
30) Blemished WW2 Trunions: $45
31) Safety Toggle WW2: $25


50 RD BELTS WITH WW2 MARKINGS
1937 DATED BELT: $75 EA
1938 DATED BELT: $50 EA
1939 DATED BELT: $40 EA
1940 DATED BELT: $25 EA
1941-42 DATED BELT: $20 EA
LATE WAR BELT: $20 EA
WW2 STARTER TAB: $30


WW2 Steel Double-Hinged Can w/ Sealing Gasket: $75 ea
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