GBB/GBBR, gas
The butt goes wrong or blocks
Incomplete cycle: the head does not recede enough to rearm, or stops at mid-race.
- Verifications
- 3
- Until
- Dismantling
- Tools
- 2
Symptoms
- The butt barely recedes and does not rearm the hammer
- You have to rearm by hand after each shot
- The head remains open while the charger is not empty
Causes
Most common to rare.
- Cold gas or almost empty chargerCommon
- Rails and heads, dry or groundCommon
- Seal of damaged blowback (definition) nozzle (definition)Possible
- Tired booster spring (definition) or head stopRare
Verifications
0/3
In the order: we start with what does not require anything to disassemble. Check as you go, the list is kept in this browser.
If the cycle becomes straight again, it is the gas: see the sheet on the cold.
Without toolsKiller removed, wipe the rails and place a thin layer of silicone oil. A rubbed head absorbs the energy of the retreat.
Simple toolsTools: Silicone oil, Precision screwdriverIts joint must be flexible and whole. Fendu, he let go of the gas that had to push the bum.
DismantlingTools: Precision screwdriver
Stop
Stop and hand over the reply to a technician if:
- A piece of the head is cracked or distorted