Es gibt eine Englische Übersetzung dazu:
Some numbers (just one example, numbers can vary). Trigger pull:
Aug with one spring in trigger assembly - 5.3 kg
Aug with one spring in trigger assembly + neu-trigger- 4.9 kg
Aug with one spring in trigger assembly + neu-trigger + RBLS - 2.5 kg
Aug with two springs in trigger assembly + neu-trigger + RBLS - 3.0 kg
Translation of the manual
All dimensions are metric (mm).
Page 1:
Steyr AUG RBLS manufacturing manual
Page 2:
From author (
ded68@inbox.ru)
This manual provides information, instructions and drawings for replacement of the original Steyr AUG retaining bolt lock (RBL) with modified part “retaining bolt lock – softened” (RBLS).
Using this manual anyone can manufacture suitable part in order to improve performance of the original design. This manual does not require any additional knowledge, usage of special tools or mechanisms.
Original forum post:
STEYR AUG A2 407 mm и STEYR AUG Z 508 mm
http://talks.guns.ru/forummessage/56/200182.html Page 3:
What are advantages of the RBLS?
RBLS changes fixation angle of the shoulder of the spring from 32 degrees (original RBL) to 90-92 degrees and thus lessens trigger pull.
Note:
Author ded68 has he’s own views on using RBLS in AUG, he is more uncomfortable with long travel distance of the trigger, moment of the hammer engagement etc. Spring modification and installation of the RBLS were proposed after trying few other different ideas (more information can be found on the forum link above).
For manufacturing 6 mm. textolite (plastic) was used. 5 mm plastic can also be used; a little gap is of no importance.
Materials and instruments:
- Calipers (accuracy 0.01- 0.001 mm)
- try-square, protractor
- needle, awl, mandrel
- drill, drill bits – 8 mm, 5 mm, 4 mm , 1.5 mm
- hacksaw, dremel
- file, needle files, sandpaper
Page 4:
Why in final variant of the RBLS fixation angle of the shoulder of the spring is 90 – 92 degrees, and not 100 and higher?
Installed spring without pressure is at 135-140 degrees. In “working” condition the angle is – 32 (32.146002) degrees. Angle of the shoulder and force F2 on the shoulder “b” should be sufficient for fixation of the swivel pin by RBL and RBLS and normal operation of the spring in general.
At angle 90-92 degrees difference in trigger pull is hardly recognizable and main resistance is provided by the friction force of the slide. (*not sure about the translation)
Page 5:
Different variants of the RBLS
Colored rectangle shows “excess part” of the RBLS, while using one “corner clamp” (*not sure about the correct translation).
Important note:
The length of the “lower side” (A) of the imaginary triangle (see picture below) – equals or higher than the length of free movement of the pin (*not sure about the correct translation). But not less than 3.12 – 3.20 mm
Page 6:
Steyr AUG RBLS drilling and marking
Page 7:
Drilling of the RBLS
How to use the scheme bellow?
Pay attention to the colors
- Green color marks the priority diameter, it should be drilled first
- Red color, this shape should be formed using milling cutter or rounded needle file, in accordance to the markings
Centers of the holes overlap and thus manual manufacture of the RBLS is preferred
Two “small” holes bellow show two variants of drilling
First – Rigid attachment of the piece and use of drilling-machine
Second – The centre of the second hole was deliberately moved to the left in order to use hand drill. Excess edge was removed with flat needle-file.
Drawing:
“Right” dimensions of the swivel = 7.95 mm and 4.95 mm. This part is made for military, and thus certain fluctuations of the accuracy can be allowed. Drill bits 8 mm and 5 mm can be used.
“Right” dimensions of the pin = 3.88 – 3.90 mm. Drill bit 4 mm can be used (read information above)
Hole for the spring = 1.40 – 1.42 mm. Drill bit 1.5 mm can be used
Page8:
Correction of sizes and centers of holes
Page 9:
Marking on this drawing is shown only for understanding of the process. While manufacturing use drawings with exact dimensions instead
Page 10:
Preliminary marking of the work piece RBL-S
Marking can be done using calipers with accuracy 0.01- 0.001 mm. Author used Mitutoyo, but any finely tuned calipers can be used. For drawing of the lines try-square, ruler, needle, awl, etc. can be used. Control points and centers of the holes can be marked with mandrel or any other suitable instrument.
Drawing:
Angle
Move centre of the hole approximately +0.25-0.5 mm. to the left
Move centre of the hole approximately +0.25-0.5 mm. to the right
…
Page 12:
Steyr AUG RBLS Drawings
Page 13:
Original RBL
…
Page 18:
Scale 1:1
Use this page only for verification of the shape. Do not use to transfer dimensions, use drawings above with exact dimensions instead
Page 19:
View of two prototype variants of the RBLS and original RBL (bottom of the page)
Das is der von waffengebraucht, oder?