Which pen to buy
-
I have V2s, a V4 and a Xulin. I reach for the Xulin the most, its mechanism is the smoothest, just need more than two colors.
-
So I received the injection pens I ordered from peptide critic. Took 3 days, which is much shorter than I expected so good job on that. I bought a V2, a V4, and a V3.5. They look cool. I have to do a little reading to make sure I understand how to set these up properly. Overall im very pleased with this purchase from peptide critic. From the community feedback and input to the simple ordering process and delivery, I really feel like this site can be called home for honest information and discussions about peptide research for my chupacabra. Want to say thank you to everyone who commented and helped me on my initial purchase and I can promise it wont be my last.
-
So I received the injection pens I ordered from peptide critic. Took 3 days, which is much shorter than I expected so good job on that. I bought a V2, a V4, and a V3.5. They look cool. I have to do a little reading to make sure I understand how to set these up properly. Overall im very pleased with this purchase from peptide critic. From the community feedback and input to the simple ordering process and delivery, I really feel like this site can be called home for honest information and discussions about peptide research for my chupacabra. Want to say thank you to everyone who commented and helped me on my initial purchase and I can promise it wont be my last.
Go onto the peptidecritic YouTube channel & watch the videos specifically on pen - I think there are 3 or 4 different ones - if I had seen them before I started with pens I would’ve saved myself a lot of time & money.
-
@Commander There were no V1's on the site when I ordered. The only one I didn't get was the 3.5 simply because it sounded like it was the same as the V4. Based on the description, I don't know what makes the 3.5 different. I just wish he would have had the plastic travel (non disposable) pens as an option.
@Nuncles IMO the v3.5 feels just a bit sturdier than the V4. V3.5 is a bit shorter. The clear piece screws on w/V3.5 instead of clicking into place on the V4 - this is a very subtle comment but one that is important to me and that is the clear plastic 3mL vial pc on the V4 clicks into place showing the scale of how much peptide is left right in line with the dial # which makes it easier reference for me. Mechanism is about the same. Can't go wrong with either but my personal preference is the V4.
BTW... also got some V2 pens for my wife because she likes the colors but I do not like those as well - they just feel "cheaper" to me. I do use Xulin for TRT (Blue) & Reta (Red) which are very classy pens - makes me feel special using those. But still through it all - my preference is the silver V4 - great great pen.
-
@Nuncles IMO the v3.5 feels just a bit sturdier than the V4. V3.5 is a bit shorter. The clear piece screws on w/V3.5 instead of clicking into place on the V4 - this is a very subtle comment but one that is important to me and that is the clear plastic 3mL vial pc on the V4 clicks into place showing the scale of how much peptide is left right in line with the dial # which makes it easier reference for me. Mechanism is about the same. Can't go wrong with either but my personal preference is the V4.
BTW... also got some V2 pens for my wife because she likes the colors but I do not like those as well - they just feel "cheaper" to me. I do use Xulin for TRT (Blue) & Reta (Red) which are very classy pens - makes me feel special using those. But still through it all - my preference is the silver V4 - great great pen.
@matthewwalsh I appreciate the insight on the V3.5. I'm kind of glad I passed on it. Personally, I think I like the "click" better than the screw in vial holder. I wasn't that impressed with the V2 but the bar had already been set by the Xulin and V4. I feel that the V4 seems to be the sweet spot right now. Yes, the Xulin is smoother, but $20 smoother? Probably not. But hey, if one's budget is more in line with Mercedes than Toyota, get the Mercedes.
-
So I received the injection pens I ordered from peptide critic. Took 3 days, which is much shorter than I expected so good job on that. I bought a V2, a V4, and a V3.5. They look cool. I have to do a little reading to make sure I understand how to set these up properly. Overall im very pleased with this purchase from peptide critic. From the community feedback and input to the simple ordering process and delivery, I really feel like this site can be called home for honest information and discussions about peptide research for my chupacabra. Want to say thank you to everyone who commented and helped me on my initial purchase and I can promise it wont be my last.
-
3.5 would be my favorite right now if I had to pick one, but all 3 are 100% better than insulin syringes
-
Now that I have a bunch of pens and multiples of each type, I find i am gravitating to specific ones that consistently run smoothly and consistently. At the moment, I am running a V1 and V2 that are flawless. One of my Gansulins is sluggish pushing peps across multiple carts. The other two seem fine. I don’t love the Xiulins if I am being honest. They seem ‘stickier’ than the other pens I have and can be hard to get started.
It might be good to make a video on maintaining and tweaking pens to keep them running smoothly. I have no reservations about taking a pen apart as long as I know how to put it back together.
I will order some V3/4’s when they are back in stock.
-
Now that I have a bunch of pens and multiples of each type, I find i am gravitating to specific ones that consistently run smoothly and consistently. At the moment, I am running a V1 and V2 that are flawless. One of my Gansulins is sluggish pushing peps across multiple carts. The other two seem fine. I don’t love the Xiulins if I am being honest. They seem ‘stickier’ than the other pens I have and can be hard to get started.
It might be good to make a video on maintaining and tweaking pens to keep them running smoothly. I have no reservations about taking a pen apart as long as I know how to put it back together.
I will order some V3/4’s when they are back in stock.
@ResearchCat To me, the 4 is the best. I like the Zulin, but like you say, it's a harder push.
-
Now that I have a bunch of pens and multiples of each type, I find i am gravitating to specific ones that consistently run smoothly and consistently. At the moment, I am running a V1 and V2 that are flawless. One of my Gansulins is sluggish pushing peps across multiple carts. The other two seem fine. I don’t love the Xiulins if I am being honest. They seem ‘stickier’ than the other pens I have and can be hard to get started.
It might be good to make a video on maintaining and tweaking pens to keep them running smoothly. I have no reservations about taking a pen apart as long as I know how to put it back together.
I will order some V3/4’s when they are back in stock.
@ResearchCat
The way the pens are built once taken apart they cannot go back together. -
Thx. That was my assumption, but I wasn’t sure. I have seen that tool to take them apart, but I have extensive experience disassembling things that cannot be re-assembled and you often don’t find out until it’s too late.

-
Thx. That was my assumption, but I wasn’t sure. I have seen that tool to take them apart, but I have extensive experience disassembling things that cannot be re-assembled and you often don’t find out until it’s too late.

@ResearchCat
The tool you are talking about doesn’t take them apart. It only unlocks a locked a gansulin/convi pen -
Oh, thanks. I guess I misunderstood what the OP was saying.
-
Almost every pen that I looked at so far is pressed together in some way or another making it impossible to be taking apart with wrecking them. It just must be a cheaper way to assemble them.
@Commander
Youre looking at the wrong pens. Even the ones on Amazon or AliExpress, which typically have a chrome band around the center, they separate into three pieces. The cap, the cartridge holder, and the injector unit.I have ordered about 11 of them off AliExpress because they are cheap. Ive seen many complaints about them being unreliable, and I found a few of the V2 units that were indeed having issues. However by inserting a single small 3d printed part to add tension to the spring mechanism inside, they all run mint now.
-
Stupid question. Ordered 3 V4's from @randy today and wanna ensure I get the right needles. All the versions take the same type/style, eh?
-
Stupid question. Ordered 3 V4's from @randy today and wanna ensure I get the right needles. All the versions take the same type/style, eh?
@hunt_ak go to the research supplies section. My favorites are in there.
https://peptidecritic.com/tools/research-supplies
On the v4 if you want to use the hidden needle feature the fatter based models wont allow you to put the cap on and hide the needle. The ones in the research supplies will.
I have never hidden a needle though.
Hello! It looks like you're interested in this conversation, but you don't have an account yet.
Getting fed up of having to scroll through the same posts each visit? When you register for an account, you'll always come back to exactly where you were before, and choose to be notified of new replies (either via email, or push notification). You'll also be able to save bookmarks and upvote posts to show your appreciation to other community members.
With your input, this post could be even better 💗
Register Login