[G&G arp 556 handrails/railsystem]

You might not have to chanege the barrels, you should be able to change the rail system leaving them in place.

Look for a rail system that includes the barrel nut and you you should be able to fit it and decide if you want a longer barrel, suppressor system extention or leave it as it is.

[Need suggestion to select good airsoft sniper]

There are a fair few bolt action rifs on the market which are gas driven but as Ed mentioned you will be better served looking at spring powered rifs unless you are looking to use hpa.

[Patches are now available(ish)]

That's not news that's nice to hear.

[Using lipos without a mosfet.]

I use 7.4 lipo in none mosfet rifs and keep an eye on the battery with a lipo alarm connected to the balance lead, works a treat.

[Ares Honey Badger]

Maple leaf, it what I tend to go for, work well and I had great results with a feiends ares honey badger using a w hold rubber.

I usually use ak2m4.co.uk for pets parts and such and have never disappointed, and they usually have a good selection of aeg rubbers.

[Another Airsoft site gone… (InRange Birmingham)]

That is a disappointing thing to read. I hope that the guys from inrange find a new home and can mange to migrate the site rather than have to loose it completely.

[G&G SMC9 vrs TM MP7 …. One has to go]

Smc9 seems to be a rif for tinkerers, as I've never seen a stock one run for very long before something goes wrong, and that's if it works from the box.

 

Keep the mp7.

[Looking for some Lipo charger buying direction]

Isdt and skyrc are the chargers I use. They have a mix of models to suit budget and desired spec/setup.

Ive used them for many years on airsoft, rc crawlers and fpv quads and they have never missed a beat.

[Patches are now available(ish)]

Jumped in to follow along as I ordered one last weekend.

[Lipo getting hot quickly]

As Hamster mentions, it sounds like you are pulling too many amps for that particular battery.

If your battery compartment isn't big enough for the 2000mah 7.5v then you can either change the motor for a higher torque, fewer revs and pull less juice from the pack or use higher c batteries which are smaller but use more of them over the course of the day.

[What have you made?]

Finished the mortar tube.

 

[Anyone Experienced With Running External Audio Through Comtac Headsets?]

I've had a simar issue.

I use these leads with my sporttac. Like you k had a stereo lead for the when I'm using the headset at work and listening to my phone (audio books etc). The mics are often mono despite looking like a stereo plug and after switching to a mono cable when plugged into the mic it worked great. I wouldn't have been my first thought especially after opening the mic to check the wiring but I spoke to jci communication and the issue is on the peltor side.

 

I now have a stereo lead in the van for work and a mono tied into my plate carrier for radio use.

[What have you made?]

Basic mortar tube for shouldered use.

[LiPo Battery Availability In The UK (August 2021)]

I get a fair few of mine from hobby rc, admittedly they are unlikely to have stick or crane type batteries.

[Joules or FPS?]

Joules is more informative however I do understand the logistics of sites wanting to chrono with .2s

 

As far as publishing a sites rule set I'd publish it as the site does as that is how it would be tested on site.

 

[Direct action bearcat or OPS rapid responder plate carrier?]

Colour choice is limited with the warrior kit, but there seems to be a few atacs fg dcs rigs for sale recently, which might be more to your camo choice.

I run a warrior recon carrier but use quite a few ops bits and bobs, mostly pouches, and they have been great quality wise,

[ASG MP9 vs TM MP7]

I've used the the mp7 but own the mp9. I didn't like the feel of the 7 as much as the 9.

Performance wise there are options for both with upgrades, with at least two companies making drop in hop/barrel combinations for the mp9.

Fps wise you might need to check the mp9, I have a cqb bolt in mine but it is possible to mod the flute valve of the standard bolt if you prefer that, I'm sure negative airsoft did one.

 

[ammo pouch bungees]

Hueys do the s&s pull tabs  and you'd just need to get some shock cord then.

[Krytac Hype]

I'd run it stock and see what it's like as is, then look to upgrade where performance possibly lacks.

As far the parts you've listed already; I'd consider a zci over the promy, significantly cheaper not significantly less quality.

I don't bother with maxx hop units, they can be very good but of late I haven't had much success with over zci rotary units.

Spring for any need fps changes but do it after the rubber change, as there's no point in changing a spring if your air seal improves and you gain fps there.

I've also had great success lately with adding perun mosfets and leaving stock motors in place, running precock with a short stroke gear so I'd play it by ear.

[Well that’s ‘different’ !]

I've seen a fair few weapon retention clips of late, while looking for something else and failing with google-fu but this is awesome.

I'm.sure it won't be long before I see a Bush wookie with holstered m4.

[Trigger Response upgrades]

Have a look at the mosfet options which could work for your particular setup. Although most of the performance gains can be done with physical mods it often easier to install a mosfet. The links of gate and perun units to grab quick upgrade to the trigger feel.

I've found the perun units to be very good and offer the performance without the price tag.

[Inner Barrel to Drop FPS]

sorry for delay in replying here, work got in the way.

 

A spring swap isnt really workable as a quick option as, as G&Gs idea of a quick change spring is to dismantle all but the gear box shell. it would be much quicker to pop the upper off and have a complete setup of hopup and inner barrel to drop in and then remove a section of outbarrel, in the same manner as fitting a tracer or such like, or like the TM Scar H has a outer barrel section which isnt required.

[Helikon training mini rig]

Would.it be worth a look at the ops minimo. There's been a few about second hand lately. It's a similar design and they are usually available via hueys (they have been good in the past for me) and the ops stuff isn't bad at all. 

[Form or Function]

Im in the middle,  few different rifs for different roles and sites, but leaning on function is what I like. I use warrior kit as its taken years of abuse but if its not something useful its not getting mount to a rif for style points.

[Boafeng Uvr5 - Any good???]

The baofeng radios are cheap and work really well, although they aren't strictly speaking legal without a license due to output power, but you'll always find people using them.