Preacher (Nerf blaster mod from Sillybutts Breacher)

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Updates:

20260813 Model fix

Thanks to user  Twubble_4362118 for reporting this

Interference found at the base of the pump grip

Model files updated with PrimingGrip_V4 and Pump Handel_V4

20260116 Model fix

Thanks to user MatBoo_3935141 for reporting these

1. Lifter and roller interface screw hole modified to make ID into 2.4mm instead of 2.9mm to prevent the screw from becoming loose. A second roller in the STEP has a different depth bocket.
   Model update: Lifter(ScrewAdjustable (needs two m3x12 screws))_Mod_V2 and LifterRoller2_V2
   

   

   
   
   

2. OG interface piece has CAD errors in the drum spring pocket. was in all the past builds, but people might run into issues
   A weird ledge on the top of this same piece that was overlooked before
   Model update: EjectionPort_Front_Interface with OG_V2
   
   

   

   
   

   

   
   

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It's the Breacher shotgun with a curved handle.

 Performance is almost like Breacher, MXL shoots at 70 fps

BOM:

You need to have the full Breacher kit, plus the following:

1. M3X14 Self-tapping qty 2 (Used in piston head)

2. M3X18 Self-tapping qty 2 (Used in piston head)

3. M3X10 SHCS qty 2 (Used in modifeid lifter)

4. M3X30 SHCS qty 5 (Grip enclosure) 

5. M3X40 SHCS qty 2 (Securing grip ASM, spring stop)

6. M3X45 SHCS qty 3 Alternative screws to secure bolt face og 50mm) 

7. Dash 016 O-ring qty 2 

8. Dash 123 O-ring qty 1 

9. Clevis Pins qty 1 - 3/16 x 1-1/2 10" long 8-32 thread 1 

10. M3 heat set insert qty 5 (Grip enclosure)

11. M3X25 SHCS qty 2 (Securing trigger ASM)

12. Small screw qty 8 (short stock +15, Long stock +20) - Flat Head Thread-Forming Screws for Plastic. Phillips, Number 4 Screw Size, 3/8"" Long

13. Hex Nut qty 1  - M4 or 8-32 Thread 

14. Threaded Rod qty 1 - M4 or 8-32 Thread, cut down one of the OG kit 12" to 10"

15. Small Spring qty  1

16. M4X50 SHCS qty 1

17. M4 Nut qty 1 (2 if rod is M4)

The add-on hardware kit is available from Bearswares: https://bearswares.shop/products/breacher-mods

Ammo (shotgun shells): 

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Printing:

If you're making the Full mod, here's the material usage are as follows:

If you have a breather and don't want to print the front section, Half of the mods material usage are as follows:

EjectionPort_Back_MOD_V3 can be fully unsupported, infill and wall like the OG version

All gas tube assembly pieces, firing group pieces, and trigger pieces all 99% infill, 7 walls

Handle can be 10% infill, 7 walls

For a matching color scheme, split color on EjectionPort_Front_TFMod like so:

As well as SideBracket (No Logo)_Split like so:

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Back section ASM

1. Assemble the Boltface_TFMod like the OG Breacher, add the ball detent on top 

2. Install 3 M3 heat inserts on PlungerCap_TFmod, and placed an qty 1 -016 O-ring in the hemispharic pocket

3. Install qty 2 TinnyPins on one side of the GasTube_V3

4. Placed the gas tube inside the PlungerCap pocket, sandwiched the o-ring in the middle, and aligned using the tiny pins. OiI the interior

5. Place down both pieces of RamBaseUpper_Cap, mind the direction relative to the gas tube. Make sure there's no gap after fully screwed in qty 2 M3X18 Self-tapping srcews

6. Assemble with the bolt face piece by first install the 3 M3 heatset inserts but USE QTY3 M3 45MM INSTEAD OF 50MM (remember o-ring)

 !!!!!!!!!!!!!!!!!!!!!!! If use 50mm it will stick out and damage the ball joint !!!!!!!!!!!!!!!!!!!!!!!!

7. Stick the gast tube asm inside EjectionPort_Back_MOD_V3, puch to the back like so

8. Seat qty 1 -016 O-ring inside RamBaseLower_SMILEY_TFMod, align with two tinny pins on the side like I picture. OiI the interior

9. Attach both RamBaseLower_Cap L&R with qty 2 M3x14mm Self-tapping screws, also make sure there's no gap after fully screwed in. Put in qty 2 -123 O-ring

10. Install the Ejector and the ShellStop_R &L same way as the OG Breacher

11. The modified lifter still uses the qty 2 M3x12mm screws for adjustment, but the roller is split in two, and needs qty 2 M3x10mm screws to install. Once done install to the main body like the OG Breacher,

12. Move over to the trigger assembly. Starting with assembling the Triggle rail on Trigger_V2 with qty 1 small screw

13. Placed the trigger asm inside the two Firing Group pieces, Secure with qty 4 small screws

14. Install qty 5 M3 heatset inserts in these locations for the left handle

15. Sandwich the right side with qty 2 M3x30mm screws

16. Drop down one of the small springs, the catch, and the trigger linkage

17. Slide in the plunger tube, followed by the plunger head (install -123 O-ring and shock pad)

18. Use the plunger tube as guide, install the handle assembly from the back of the main body, with the plunger going into the plunger tube

19. Insert the Grip link inside Handel_Top_V3, secure with qty 1 small screw, then cover the opening on the top of the handle assembly. Secure with qty 2 small screw

20. At the red locations insert qty 3 M3x30mm screws, at the blue location insert qty 1 M3x40mm screw. To the green location insert the take-down pin

21. In green locations insert qty 2 small screws, and in red insert qty 2 M3X25mm screws

22. Install TopBracing and SideBracket with qty4 small screws

23a. OG Version: Connect the front part with the alternative piece “EjectionPort_Front_Interface with OG”

24a. Install the back and front Picatinny rails with qty 6 small screws. If mod install on the OG front piece the steps are complete here

23b. TF2 Version: The front sections are very similar. The interface location will screw directly onto TopBracing instead of through the Picatinny rails. The Mag front and Clip_V2 are secured by a M4x50mm bolt, a M4 nut (green), and a small screw (red)

24b. The EjectionPort_Front_TFMod is screwed on at an angle

25.  After securing the treaded rod with the M4 (or 8-32) nut, fit the Plug V3 over it, and align it so the face of the body is smooth. Insert qty 1 M4x40mm screw through and into the plug. Stop before the plug is pushed out

26.  These access ports here will allow adjustment to the lifter without disassembly